Vulnerabilities > CVE-2019-18423 - Off-by-one Error vulnerability in multiple products

047910
CVSS 8.8 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
xen
debian
fedoraproject
CWE-193
nessus

Summary

An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service via a XENMEM_add_to_physmap hypercall. p2m->max_mapped_gfn is used by the functions p2m_resolve_translation_fault() and p2m_get_entry() to sanity check guest physical frame. The rest of the code in the two functions will assume that there is a valid root table and check that with BUG_ON(). The function p2m_get_root_pointer() will ignore the unused top bits of a guest physical frame. This means that the function p2m_set_entry() will alias the frame. However, p2m->max_mapped_gfn will be updated using the original frame. It would be possible to set p2m->max_mapped_gfn high enough to cover a frame that would lead p2m_get_root_pointer() to return NULL in p2m_get_entry() and p2m_resolve_translation_fault(). Additionally, the sanity check on p2m->max_mapped_gfn is off-by-one allowing "highest mapped + 1" to be considered valid. However, p2m_get_root_pointer() will return NULL. The problem could be triggered with a specially crafted hypercall XENMEM_add_to_physmap{, _batch} followed by an access to an address (via hypercall or direct access) that passes the sanity check but cause p2m_get_root_pointer() to return NULL. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). Xen version 4.8 and newer are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected.

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-CBB732F760.NASL
    descriptionadd missing XSA-299 patches x86: Machine Check Error on Page Size Change DoS [XSA-304, CVE-2018-12207] TSX Asynchronous Abort speculative side channel [XSA-305, CVE-2019-11135] ---- VCPUOP_initialise DoS [XSA-296, CVE-2019-18420] missing descriptor table limit checking in x86 PV emulation [XSA-298, CVE-2019-18425] Issues with restartable PV type change operations [XSA-299, CVE-2019-18421] (#1767726) add-to-physmap can be abused to DoS Arm hosts [XSA-301, CVE-2019-18423] passed through PCI devices may corrupt host memory after deassignment [XSA-302, CVE-2019-18424] (#1767731) ARM: Interrupts are unconditionally unmasked in exception handlers [XSA-303, CVE-2019-18422] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id131460
    published2019-12-03
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/131460
    titleFedora 30 : xen (2019-cbb732f760)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2019-cbb732f760.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(131460);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/10");
    
      script_cve_id("CVE-2018-12207", "CVE-2019-11135", "CVE-2019-18420", "CVE-2019-18421", "CVE-2019-18422", "CVE-2019-18423", "CVE-2019-18424", "CVE-2019-18425");
      script_xref(name:"FEDORA", value:"2019-cbb732f760");
      script_xref(name:"IAVB", value:"2019-B-0084-S");
    
      script_name(english:"Fedora 30 : xen (2019-cbb732f760)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "add missing XSA-299 patches x86: Machine Check Error on Page Size
    Change DoS [XSA-304, CVE-2018-12207] TSX Asynchronous Abort
    speculative side channel [XSA-305, CVE-2019-11135]
    
    ----
    
    VCPUOP_initialise DoS [XSA-296, CVE-2019-18420] missing descriptor
    table limit checking in x86 PV emulation [XSA-298, CVE-2019-18425]
    Issues with restartable PV type change operations [XSA-299,
    CVE-2019-18421] (#1767726) add-to-physmap can be abused to DoS Arm
    hosts [XSA-301, CVE-2019-18423] passed through PCI devices may corrupt
    host memory after deassignment [XSA-302, CVE-2019-18424] (#1767731)
    ARM: Interrupts are unconditionally unmasked in exception handlers
    [XSA-303, CVE-2019-18422]
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora update system website.
    Tenable has attempted to automatically clean and format it as much as
    possible without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bodhi.fedoraproject.org/updates/FEDORA-2019-cbb732f760"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected xen package.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:xen");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:30");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/31");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/11/28");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/03");
      script_set_attribute(attribute:"stig_severity", value:"I");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! preg(pattern:"^30([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 30", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
    
    
    flag = 0;
    if (rpm_check(release:"FC30", reference:"xen-4.11.2-3.fc30")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
    }
    
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-202003-56.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-202003-56 (Xen: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Xen. Please review the referenced CVE identifiers for details. Impact : A local attacker could potentially gain privileges on the host system or cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen2020-04-01
    modified2020-03-27
    plugin id134964
    published2020-03-27
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/134964
    titleGLSA-202003-56 : Xen: Multiple vulnerabilities (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Gentoo Linux Security Advisory GLSA 202003-56.
    #
    # The advisory text is Copyright (C) 2001-2020 Gentoo Foundation, Inc.
    # and licensed under the Creative Commons - Attribution / Share Alike 
    # license. See http://creativecommons.org/licenses/by-sa/3.0/
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(134964);
      script_version("1.2");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/31");
    
      script_cve_id("CVE-2018-12126", "CVE-2018-12127", "CVE-2018-12130", "CVE-2018-12207", "CVE-2019-11091", "CVE-2019-11135", "CVE-2019-18420", "CVE-2019-18421", "CVE-2019-18423", "CVE-2019-18424", "CVE-2019-18425", "CVE-2019-19577", "CVE-2019-19578", "CVE-2019-19580", "CVE-2019-19581", "CVE-2019-19582", "CVE-2019-19583");
      script_xref(name:"GLSA", value:"202003-56");
    
      script_name(english:"GLSA-202003-56 : Xen: Multiple vulnerabilities (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)");
      script_summary(english:"Checks for updated package(s) in /var/db/pkg");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Gentoo host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "The remote host is affected by the vulnerability described in GLSA-202003-56
    (Xen: Multiple vulnerabilities)
    
        Multiple vulnerabilities have been discovered in Xen. Please review the
          referenced CVE identifiers for details.
      
    Impact :
    
        A local attacker could potentially gain privileges on the host system or
          cause a Denial of Service condition.
      
    Workaround :
    
        There is no known workaround at this time."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://security.gentoo.org/glsa/202003-56"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "All Xen users should upgrade to the latest version:
          # emerge --sync
          # emerge --ask --oneshot --verbose '>=app-emulation/xen-4.12.0-r1'"
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:xen");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:xen-tools");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/05/30");
      script_set_attribute(attribute:"patch_publication_date", value:"2020/03/25");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/03/27");
      script_set_attribute(attribute:"in_the_news", value:"true");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Gentoo Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("qpkg.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
    if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    flag = 0;
    
    if (qpkg_check(package:"app-emulation/xen", unaffected:make_list("ge 4.12.0-r1"), vulnerable:make_list("lt 4.12.0-r1"))) flag++;
    if (qpkg_check(package:"app-emulation/xen-tools", unaffected:make_list("ge 4.12.0-r1"), vulnerable:make_list("lt 4.12.0-r1"))) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = qpkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Xen");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-376EC5C107.NASL
    descriptionadd missing XSA-299 patches ---- x86: Machine Check Error on Page Size Change DoS [XSA-304, CVE-2018-12207] TSX Asynchronous Abort speculative side channel [XSA-305, CVE-2019-11135] ---- VCPUOP_initialise DoS [XSA-296, CVE-2019-18420] missing descriptor table limit checking in x86 PV emulation [XSA-298, CVE-2019-18425] Issues with restartable PV type change operations [XSA-299, CVE-2019-18421] add-to-physmap can be abused to DoS Arm hosts [XSA-301, CVE-2019-18423] passed through PCI devices may corrupt host memory after deassignment [XSA-302, CVE-2019-18424] ARM: Interrupts are unconditionally unmasked in exception handlers [XSA-303, CVE-2019-18422] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id131143
    published2019-11-20
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/131143
    titleFedora 31 : xen (2019-376ec5c107)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2019-376ec5c107.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(131143);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/10");
    
      script_cve_id("CVE-2018-12207", "CVE-2019-11135", "CVE-2019-18420", "CVE-2019-18421", "CVE-2019-18422", "CVE-2019-18423", "CVE-2019-18424", "CVE-2019-18425");
      script_xref(name:"FEDORA", value:"2019-376ec5c107");
      script_xref(name:"IAVB", value:"2019-B-0084-S");
    
      script_name(english:"Fedora 31 : xen (2019-376ec5c107)");
      script_summary(english:"Checks rpm output for the updated package.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote Fedora host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "add missing XSA-299 patches
    
    ----
    
    x86: Machine Check Error on Page Size Change DoS [XSA-304,
    CVE-2018-12207] TSX Asynchronous Abort speculative side channel
    [XSA-305, CVE-2019-11135]
    
    ----
    
    VCPUOP_initialise DoS [XSA-296, CVE-2019-18420] missing descriptor
    table limit checking in x86 PV emulation [XSA-298, CVE-2019-18425]
    Issues with restartable PV type change operations [XSA-299,
    CVE-2019-18421] add-to-physmap can be abused to DoS Arm hosts
    [XSA-301, CVE-2019-18423] passed through PCI devices may corrupt host
    memory after deassignment [XSA-302, CVE-2019-18424] ARM: Interrupts
    are unconditionally unmasked in exception handlers [XSA-303,
    CVE-2019-18422]
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Fedora update system website.
    Tenable has attempted to automatically clean and format it as much as
    possible without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bodhi.fedoraproject.org/updates/FEDORA-2019-376ec5c107"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected xen package.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:xen");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:31");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/31");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/11/19");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/20");
      script_set_attribute(attribute:"stig_severity", value:"I");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Fedora Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/RedHat/release");
    if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
    os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
    os_ver = os_ver[1];
    if (! preg(pattern:"^31([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 31", "Fedora " + os_ver);
    
    if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);
    
    
    flag = 0;
    if (rpm_check(release:"FC31", reference:"xen-4.12.1-6.fc31")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_HOLE,
        extra      : rpm_report_get()
      );
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
    }
    
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-301.NASL
    descriptionAccording to its self-reported version number, the Xen Hypervisor installed on the remote host is affected by a denial of service vulnerability due to improper validation of input data. An authenticated, remote attack can exploit this, via a specially crafted hypercall followed by an access to an address that passes the sanity check but causes a hypervisor crash . Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware configurations or if patches were applied manually to the source code before a recompile and reinstall.
    last seen2020-06-01
    modified2020-06-02
    plugin id132934
    published2020-01-15
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132934
    titleXen Denial of Service Vulnerability (XSA-301)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(132934);
      script_version("1.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/10");
    
      script_cve_id("CVE-2019-18423");
      script_xref(name:"IAVB", value:"2019-B-0084-S");
    
      script_name(english:"Xen Denial of Service Vulnerability (XSA-301)");
      script_summary(english:"Checks the 'xl info' output for the Xen hypervisor version.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote Xen hypervisor installation is missing a security update.");
      script_set_attribute(attribute:"description", value:
    "According to its self-reported version number, the Xen Hypervisor installed on the remote host is affected by a denial
    of service vulnerability due to improper validation of input data. An authenticated, remote attack can exploit this, via
    a specially crafted hypercall followed by an access to an address that passes the sanity
    check but causes a hypervisor crash . 
    
    Note that Nessus has checked the changeset versions based on the xen.git change log. Nessus did not check guest hardware
    configurations or if patches were applied manually to the source code before a recompile and reinstall.");
      # https://xenbits.xen.org/xsa/advisory-301.html
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7258df64");
      script_set_attribute(attribute:"solution", value:
    "Apply the appropiate patch according to the vendor advisory.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-18423");
    
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/31");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/10/31");
      script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/15");
    
      script_set_attribute(attribute:"potential_vulnerability", value:"true");
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:xen:xen");
      script_set_attribute(attribute:"stig_severity", value:"I");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Misc.");
    
      script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("xen_server_detect.nbin");
      script_require_keys("installed_sw/Xen Hypervisor", "Settings/ParanoidReport");
    
      exit(0);
    }
    
    include("audit.inc");
    include("global_settings.inc");
    include("install_func.inc");
    include("misc_func.inc");
    
    app_name = "Xen Hypervisor";
    install  = get_single_install(app_name:app_name);
    if (report_paranoia < 2) audit(AUDIT_PARANOID);
    
    version         = install['version'];
    display_version = install['display_version'];
    path            = install['path'];
    managed_status  = install['Managed status'];
    changeset       = install['Changeset'];
    
    if (!empty_or_null(changeset))
      display_version += " (changeset " + changeset + ")";
    
    # Installations that are vendor-managed are handled by OS-specific local package checks
    if (managed_status == "managed")
      audit(AUDIT_INST_PATH_NOT_VULN, app_name, display_version, path);
    
    fixes['4.8']['fixed_ver']           = '4.8.5';
    fixes['4.8']['fixed_ver_display']   = '4.8.5 (changeset 4ffb12e)';
    fixes['4.8']['affected_ver_regex']  = '^4\\.8\\.';
    fixes['4.8']['affected_changesets'] = make_list(
    '929ec99', 'ae9ec06', '6c4efc1', '2867c7e', '611ca5b', '12ac129', 'f1bf612', '422d637', '6699295', '10105fa', 
    'bf78103', '219b64d', 'f03e1b7', '048bbe8', '151406a', 'd02aeba', '960670a', '4ed28df', 'c67210f', 'd4d3ab3', 
    'd87211e', 'a9acbcf', '514de95', '48ab64f', '181ed91', 'c3fdb25', '7feb3cc', '343c611', '257048f', '491e033',
    '3683ec2', 'a172d06', '52092fc', 'e0d6cde', 'cc1c9e3', 'f6a4af3', 'ece24c0', '175a698', '48f5cf7', '9eb6247',
    '31cbd18', 'fcf002d', 'ecbf88a', 'd929136', '8099c04', '752fb21', 'a95a103', '3dcb199', '55da36f', '160f050',
    '194b7a2', 'a556287', '2032f86', 'e9d860f', 'a1f8fe0', '5bc841c', '4539dbc', 'dcd6efd', '88fb22b', '1c4ab1e',
    '40ad83f', '51c3b69', '44aba8b', '067ec7d', 'f51d8e5', 'b9b0c46', '908e768');
    
    fixes['4.9']['fixed_ver']           = '4.9.4';
    fixes['4.9']['fixed_ver_display']   = '4.9.4 (changeset 632fb4e)';
    fixes['4.9']['affected_ver_regex']  = '^4\\.9\\.';
    fixes['4.9']['affected_changesets'] = make_list(
    '4608c6d', '7daacca', '859e48e', '5be2dd0', 'b0147bd', 'cadd66a', 'd3c4b60', 'd59f5c4', '44303c6', '79538ba', 
    '80c3157', '73f1a55', 'bc20fb1', '754a531', '7b032c2', 'ff4fdf0', '8d2a688', 'b9013d7', 'bc8e5ec', '34907f5',
    'e70bf7e', 'fa0b891', '3a8177c', '04ec835', '8d63ec4', '1ff6b4d', 'f092d86', 'e4b534f', '87c49fe', '19becb8',
    '43775c0', 'f6b0f33', 'a17e75c', '67530e7', 'f804549', '84f81a8', '56aa239', '105db42', 'd9da3ea', 'ac90240',
    '3db28b0', '9b6f1c0', '0c4bbad', '917d8d3', '3384ea4', '352421f', '04e9dcb', '1612f15', 'f952b1d', '63d9330',
    'f72414a', 'ac3a5f8', '1ae6b8e', '1dd3dcc', '7390fa1', '7e78dc4', '8fdfb1e', '55d36e2', '045f37c', 'dd7e637',
    '7a40b5b', 'f5acf97');
    
    fixes['4.10']['fixed_ver']           = '4.10.4';
    fixes['4.10']['fixed_ver_display']   = '4.10.4 (changeset 13ad331)';
    fixes['4.10']['affected_ver_regex']  = '^4\\.10\\.';
    fixes['4.10']['affected_changesets'] = make_list(
    '61b75d9', 'e70e7bf', 'e966e2e', 'dfa16a1', 'a71e199', 'c98be9e', 'a548e10', 'd3c0e84', '53b1572', '7203f9a',
    '6d1659d', 'a782173', '24e90db', '0824bc6', 'e6f3135', '3131bf9');
    
    fixes['4.11']['fixed_ver']           = '4.11.3';
    fixes['4.11']['fixed_ver_display']   = '4.11.3-pre (changeset 56767b7)';
    fixes['4.11']['affected_ver_regex']  = '^4\\.11\\.';
    fixes['4.11']['affected_changesets'] = make_list(
    '952f362', '7c3c7d8', 'ee78046', '05c14f6', '6fed54c', '766edd7', '657dc2d', 'be89e98', '273cf03', 'd78a967',
    'c20ab0c', '5350514', '19bb4f5', 'ca185ab', '0047407', 'aebe055', 'd6d52bc', '317de0a', '1b16093', 'ce7b549',
    '621b2d0', '8502a2c', '7f5f48d', '7824b9f', 'b52bcda', '27ff738', '6d36734', 'e2e653f', '9eac932', 'd4fe232',
    'ba287c7', 'e33ce32', '28ed7a5', '527e324', '91836ce', '6eb3f76', 'cb86f3d', '8bfcd2e', 'fb1db30', 'b5433e7',
    'b6ef69d', 'd27973c', 'ba6f5be', '4c6142e', '6e63afe', '5fcaaae', 'b0d4cec', 'c76e47d', 'a43eb8a', '3342ee9',
    'b222046', '37ccdfd', '8bbb3e9', 'ff5ddf0', '802f994', '10582ea', '4e95d85', 'da235ee', '32bdae2', 'b647da4',
    '1ec05c2', '9b91bec', 'dc3cd3d', '3311f10', '5fd47c5', '6af54f7', 'c250e2d', '08cb4b9', '8efcc0d', '1cf304f',
    'c14026b', 'c719519', '93ad919', 'fcc4f5d', '2f7f16c', 'fddda5d', 'd0dc725', '7ca58e5', 'be800a1');
    
    fixes['4.12']['fixed_ver']           = '4.12.2';
    fixes['4.12']['fixed_ver_display']   = '4.12.2-pre (changeset df67757)';
    fixes['4.12']['affected_ver_regex']  = '^4\\.12\\.';
    fixes['4.12']['affected_changesets'] = make_list(
    'bbcd6c5', '7575728', 'db91ac4', '5698505', '28c209e', '1b1295e', '94ff3cf', '3918f99', '81a0e12', '113282b', 
    '828e277', 'f5af2b9', '09513ab', '3dc7b91', '3d83e00', '26b8dd7', '5572ba9', 'bb4c1a8', '81feea0', '9f74689',
    '5f1c9e4', '4b5cc95', 'ab1e6a7', '801acf8', '97b4698', 'e28f7d6', '4fe70a1', 'c288534', '2a8209f', 'bc87a2d',
    '8fbf991', '8382d02', 'e142459', '0d210c0', '89de994', '9187046', '634a4d3', 'b6ee060', '61770e7', '599d6d2',
    '9d73672', 'e6ccef1', '2b84ade', 'd2ca39f', '04a2fe9', '3c10d06', '4e145fd', '07ec556', '847fc70', '5ea346e',
    'd42fb06', '32443f6', 'a5fc553', 'b465705', 'd04466f', 'be2cd69', '50b9123', '8b129ba', 'b527557');
    
    
    fix = NULL;
    foreach ver_branch (keys(fixes))
    {
      if (version =~ fixes[ver_branch]['affected_ver_regex'])
      {
        ret = ver_compare(ver:version, fix:fixes[ver_branch]['fixed_ver']);
        if (ret < 0)
          fix = fixes[ver_branch]['fixed_ver_display'];
        else if (ret == 0)
        {
          if (empty_or_null(changeset) || empty_or_null(fixes[ver_branch]['affected_changesets']))
            fix = fixes[ver_branch]['fixed_ver_display'];
          else
            foreach affected_changeset (fixes[ver_branch]['affected_changesets'])
              if (changeset == affected_changeset)
                fix = fixes[ver_branch]['fixed_ver_display'];
        }
      }
    }
    
    if (empty_or_null(fix))
      audit(AUDIT_INST_PATH_NOT_VULN, app_name, display_version, path);
    
    items  = make_array(
      "Installed version", display_version,
      "Fixed version", fix,
      "Path", path
    );
    
    order  = make_list("Path", "Installed version", "Fixed version");
    report = report_items_str(report_items:items, ordered_fields:order) + '\n';
    
    security_report_v4(port:0, extra:report, severity:SECURITY_HOLE);
    
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-3309-1.NASL
    descriptionThis update for xen fixes the following issues : CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307). CVE-2019-19582: Fixed a potential infinite loop when x86 accesses to bitmaps with a compile time known size of 64 (bsc#1158003 XSA-307). CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest,leading to a guest denial of service (bsc#1158004 XSA-308). CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309). CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310). CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311). CVE-2019-19579: Fixed a privilege escaltion where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306). CVE-2019-18423: A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS) (bsc#1154460 XSA-301). CVE-2019-18422: A malicious ARM guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified. (bsc#1154464 XSA-303) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id132091
    published2019-12-17
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132091
    titleSUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2019:3309-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from SUSE update advisory SUSE-SU-2019:3309-1.
    # The text itself is copyright (C) SUSE.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(132091);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/10");
    
      script_cve_id("CVE-2019-18422", "CVE-2019-18423", "CVE-2019-19577", "CVE-2019-19578", "CVE-2019-19579", "CVE-2019-19580", "CVE-2019-19581", "CVE-2019-19582", "CVE-2019-19583");
      script_xref(name:"IAVB", value:"2019-B-0091-S");
    
      script_name(english:"SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2019:3309-1)");
      script_summary(english:"Checks rpm output for the updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote SUSE host is missing one or more security updates."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update for xen fixes the following issues :
    
    CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm
    (bsc#1158003 XSA-307).
    
    CVE-2019-19582: Fixed a potential infinite loop when x86 accesses to
    bitmaps with a compile time known size of 64 (bsc#1158003 XSA-307).
    
    CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH
    guest userspace code to crash the guest,leading to a guest denial of
    service (bsc#1158004 XSA-308).
    
    CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest
    could have caused hypervisor crash resulting in denial of service
    affecting the entire host (bsc#1158005 XSA-309).
    
    CVE-2019-19580: Fixed a privilege escalation where a malicious PV
    guest administrator could have been able to escalate their privilege
    to that of the host (bsc#1158006 XSA-310).
    
    CVE-2019-19577: Fixed an issue where a malicious guest administrator
    could have caused Xen to access data structures while they are being
    modified leading to a crash (bsc#1158007 XSA-311).
    
    CVE-2019-19579: Fixed a privilege escaltion where an untrusted domain
    with access to a physical device can DMA into host memory (bsc#1157888
    XSA-306).
    
    CVE-2019-18423: A malicious guest administrator may cause a hypervisor
    crash, resulting in a Denial of Service (DoS) (bsc#1154460 XSA-301).
    
    CVE-2019-18422: A malicious ARM guest might contrive to arrange for
    critical Xen code to run with interrupts erroneously enabled. This
    could lead to data corruption, denial of service, or possibly even
    privilege escalation. However a precise attack technique has not been
    identified. (bsc#1154464 XSA-303)
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the SUSE security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1154460"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1154464"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1157888"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1158003"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1158004"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1158005"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1158006"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.suse.com/show_bug.cgi?id=1158007"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-18422/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-18423/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-19577/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-19578/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-19579/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-19580/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-19581/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-19582/"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://www.suse.com/security/cve/CVE-2019-19583/"
      );
      # https://www.suse.com/support/update/announcement/2019/suse-su-20193309-1/
      script_set_attribute(
        attribute:"see_also",
        value:"http://www.nessus.org/u?8871f024"
      );
      script_set_attribute(
        attribute:"solution", 
        value:
    "To install this SUSE Security Update use the SUSE recommended
    installation methods like YaST online_update or 'zypper patch'.
    
    Alternatively you can run the command listed for your product :
    
    SUSE Linux Enterprise Module for Server Applications 15:zypper in -t
    patch SUSE-SLE-Module-Server-Applications-15-2019-3309=1
    
    SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch
    SUSE-SLE-Module-Basesystem-15-2019-3309=1"
      );
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-debugsource");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-devel");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU-debuginfo");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/31");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/12/16");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/17");
      script_set_attribute(attribute:"stig_severity", value:"I");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/SuSE/release");
    if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
    os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
    if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
    os_ver = os_ver[1];
    if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver);
    
    if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    cpu = get_kb_item("Host/cpu");
    if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
    if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);
    if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", cpu);
    
    
    sp = get_kb_item("Host/SuSE/patchlevel");
    if (isnull(sp)) sp = "0";
    if (os_ver == "SLES15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP0", os_ver + " SP" + sp);
    if (os_ver == "SLED15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP0", os_ver + " SP" + sp);
    
    
    flag = 0;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-debugsource-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-devel-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-debuginfo-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-debugsource-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-libs-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-libs-debuginfo-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-debugsource-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-libs-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-libs-debuginfo-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-4.10.4_08-3.28.1")) flag++;
    if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.10.4_08-3.28.1")) flag++;
    
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen");
    }
    
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-2508.NASL
    descriptionThis update for xen fixes the following issues : - CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a race condition in the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional. (bsc#1155945) - CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate sidechannel information leaks out of microarchitectural buffers, similar to the previously described
    last seen2020-06-01
    modified2020-06-02
    plugin id131062
    published2019-11-15
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/131062
    titleopenSUSE Security Update : xen (openSUSE-2019-2508)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from openSUSE Security Update openSUSE-2019-2508.
    #
    # The text description of this plugin is (C) SUSE LLC.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(131062);
      script_version("1.4");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/10");
    
      script_cve_id("CVE-2018-12207", "CVE-2019-11135", "CVE-2019-18420", "CVE-2019-18421", "CVE-2019-18422", "CVE-2019-18423", "CVE-2019-18424", "CVE-2019-18425");
      script_xref(name:"IAVB", value:"2019-B-0084-S");
    
      script_name(english:"openSUSE Security Update : xen (openSUSE-2019-2508)");
      script_summary(english:"Check for the openSUSE-2019-2508 patch");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote openSUSE host is missing a security update."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "This update for xen fixes the following issues :
    
      - CVE-2018-12207: Untrusted virtual machines on Intel CPUs
        could exploit a race condition in the Instruction Fetch
        Unit of the Intel CPU to cause a Machine Exception
        during Page Size Change, causing the CPU core to be
        non-functional. (bsc#1155945)
    
      - CVE-2019-11135: Aborting an asynchronous TSX operation
        on Intel CPUs with Transactional Memory support could be
        used to facilitate sidechannel information leaks out of
        microarchitectural buffers, similar to the previously
        described 'Microarchitectural Data Sampling' attack.
        (bsc#1152497).
    
      - CVE-2019-18423: A malicious guest administrator may
        cause a hypervisor crash, resulting in a Denial of
        Service (DoS). (bsc#1154460).
    
      - CVE-2019-18422: A malicious ARM guest might contrive to
        arrange for critical Xen code to run with interrupts
        erroneously enabled. This could lead to data corruption,
        denial of service, or possibly even privilege
        escalation. However a precise attack technique has not
        been identified. (bsc#1154464)
    
      - CVE-2019-18424: An untrusted domain with access to a
        physical device can DMA into host memory, leading to
        privilege escalation. (bsc#1154461).
    
      - CVE-2019-18421: A malicious PV guest administrator may
        have been able to escalate their privilege to that of
        the host. (bsc#1154458).
    
      - CVE-2019-18425: 32-bit PV guest user mode could elevate
        its privileges to that of the guest kernel.
        (bsc#1154456).
    
      - CVE-2019-18420: Malicious x86 PV guests may have caused
        a hypervisor crash, resulting in a Denial of Service
        (Dos). (bsc#1154448)
    
      - Upstream bug fixes (bsc#1027519)
    
    This update was imported from the SUSE:SLE-15-SP1:Update update
    project."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1027519"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1152497"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1154448"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1154456"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1154458"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1154460"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1154461"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1154464"
      );
      script_set_attribute(
        attribute:"see_also",
        value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1155945"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected xen packages.");
      script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
      script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-debugsource");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-devel");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-doc-html");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs-32bit");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs-32bit-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-libs-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools-debuginfo");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools-domU");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:xen-tools-domU-debuginfo");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.1");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/31");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/11/14");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/15");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_set_attribute(attribute:"stig_severity", value:"I");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"SuSE Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("rpm.inc");
    
    if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/SuSE/release");
    if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
    if (release !~ "^(SUSE15\.1)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.1", release);
    if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    ourarch = get_kb_item("Host/cpu");
    if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
    if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);
    
    flag = 0;
    
    if ( rpm_check(release:"SUSE15.1", reference:"xen-debugsource-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"xen-devel-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"xen-libs-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"xen-libs-debuginfo-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"xen-tools-domU-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", reference:"xen-tools-domU-debuginfo-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"xen-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"xen-doc-html-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"xen-libs-32bit-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"xen-libs-32bit-debuginfo-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"xen-tools-4.12.1_04-lp151.2.6.1") ) flag++;
    if ( rpm_check(release:"SUSE15.1", cpu:"x86_64", reference:"xen-tools-debuginfo-4.12.1_04-lp151.2.6.1") ) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
      else security_hole(0);
      exit(0);
    }
    else
    {
      tested = pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "xen / xen-debugsource / xen-devel / xen-doc-html / xen-libs / etc");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-865BB16900.NASL
    descriptionVCPUOP_initialise DoS [XSA-296, CVE-2019-18420] missing descriptor table limit checking in x86 PV emulation [XSA-298, CVE-2019-18425] Issues with restartable PV type change operations [XSA-299, CVE-2019-18421] (#1767726) add-to-physmap can be abused to DoS Arm hosts [XSA-301, CVE-2019-18423] passed through PCI devices may corrupt host memory after deassignment [XSA-302, CVE-2019-18424] (#1767731) ARM: Interrupts are unconditionally unmasked in exception handlers [XSA-303, CVE-2019-18422] Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id131098
    published2019-11-18
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/131098
    titleFedora 29 : xen (2019-865bb16900)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-3310-1.NASL
    descriptionThis update for xen fixes the following issues : CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307). CVE-2019-19582: Fixed a potential infinite loop when x86 accesses to bitmaps with a compile time known size of 64 (bsc#1158003 XSA-307). CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest,leading to a guest denial of service (bsc#1158004 XSA-308). CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309). CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310). CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311). CVE-2019-19579: Fixed a privilege escaltion where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306). CVE-2019-18423: A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). (bsc#1154460). CVE-2019-18424: An untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation. (bsc#1154461). CVE-2019-18422: A malicious ARM guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified. (bsc#1154464) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id132092
    published2019-12-17
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132092
    titleSUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2019:3310-1)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-3297-1.NASL
    descriptionThis update for xen fixes the following issues : CVE-2019-19581: Fixed a potential out of bounds on 32-bit Arm (bsc#1158003 XSA-307). CVE-2019-19582: Fixed a potential infinite loop when x86 accesses to bitmaps with a compile time known size of 64 (bsc#1158003 XSA-307). CVE-2019-19583: Fixed improper checks which could have allowed HVM/PVH guest userspace code to crash the guest,leading to a guest denial of service (bsc#1158004 XSA-308). CVE-2019-19578: Fixed an issue where a malicious or buggy PV guest could have caused hypervisor crash resulting in denial of service affecting the entire host (bsc#1158005 XSA-309). CVE-2019-19580: Fixed a privilege escalation where a malicious PV guest administrator could have been able to escalate their privilege to that of the host (bsc#1158006 XSA-310). CVE-2019-19577: Fixed an issue where a malicious guest administrator could have caused Xen to access data structures while they are being modified leading to a crash (bsc#1158007 XSA-311). CVE-2019-19579: Fixed a privilege escaltion where an untrusted domain with access to a physical device can DMA into host memory (bsc#1157888 XSA-306). CVE-2019-18420: Malicious x86 PV guests may have caused a hypervisor crash, resulting in a denial of service (bsc#1154448 XSA-296) CVE-2019-18425: 32-bit PV guest user mode could elevate its privileges to that of the guest kernel. (bsc#1154456 XSA-298). CVE-2019-18421: A malicious PV guest administrator may have been able to escalate their privilege to that of the host. (bsc#1154458 XSA-299). CVE-2019-18423: A malicious guest administrator may cause a hypervisor crash, resulting in a denial of service (bsc#1154460 XSA-301). CVE-2019-18422: A malicious ARM guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified. (bsc#1154464 XSA-303) CVE-2019-18424: An untrusted domain with access to a physical device can DMA into host memory, leading to privilege escalation. (bsc#1154461 XSA-302). CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a race condition in the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional. (bsc#1155945 XSA-304) CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate sidechannel information leaks out of microarchitectural buffers, similar to the previously described
    last seen2020-06-01
    modified2020-06-02
    plugin id132073
    published2019-12-16
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132073
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2019:3297-1)
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4602.NASL
    descriptionMultiple vulnerabilities have been discovered in the Xen hypervisor, which could result in denial of service, guest-to-host privilege escalation or information leaks. In addition this update provides mitigations for the
    last seen2020-06-01
    modified2020-06-02
    plugin id132875
    published2020-01-15
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/132875
    titleDebian DSA-4602-1 : xen - security update (MDSUM/RIDL) (MFBDS/RIDL/ZombieLoad) (MLPDS/RIDL) (MSBDS/Fallout)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2019-2961-1.NASL
    descriptionThis update for xen fixes the following issues : CVE-2018-12207: Untrusted virtual machines on Intel CPUs could exploit a race condition in the Instruction Fetch Unit of the Intel CPU to cause a Machine Exception during Page Size Change, causing the CPU core to be non-functional. (bsc#1155945) CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate sidechannel information leaks out of microarchitectural buffers, similar to the previously described
    last seen2020-06-01
    modified2020-06-02
    plugin id130959
    published2019-11-13
    reporterThis script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/130959
    titleSUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2019:2961-1)