Vulnerabilities > CVE-2019-18421 - Race Condition vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
high complexity
xen
debian
fedoraproject
opensuse
CWE-362
nessus
NVD
Published: 2019-10-31
Updated: 2024-11-21

Summary

An issue was discovered in Xen through 4.12.x allowing x86 PV guest OS users to gain host OS privileges by leveraging race conditions in pagetable promotion and demotion operations. There are issues with restartable PV type change operations. To avoid using shadow pagetables for PV guests, Xen exposes the actual hardware pagetables to the guest. In order to prevent the guest from modifying these page tables directly, Xen keeps track of how pages are used using a type system; pages must be "promoted" before being used as a pagetable, and "demoted" before being used for any other type. Xen also allows for "recursive" promotions: i.e., an operating system promoting a page to an L4 pagetable may end up causing pages to be promoted to L3s, which may in turn cause pages to be promoted to L2s, and so on. These operations may take an arbitrarily large amount of time, and so must be re-startable. Unfortunately, making recursive pagetable promotion and demotion operations restartable is incredibly complicated, and the code contains several races which, if triggered, can cause Xen to drop or retain extra type counts, potentially allowing guests to get write access to in-use pagetables. A malicious PV guest administrator may be able to escalate their privilege to that of the host. All x86 systems with untrusted PV guests are vulnerable. HVM and PVH guests cannot exercise this vulnerability.

Vulnerable Configurations

Part Description Count
OS
Xen
44
OS
Debian
2
OS
Fedoraproject
3
OS
Opensuse
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Leveraging Race Conditions
    This attack targets a race condition occurring when multiple processes access and manipulate the same resource concurrently and the outcome of the execution depends on the particular order in which the access takes place. The attacker can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance a race condition can occur while accessing a file, the attacker can trick the system by replacing the original file with his version and cause the system to read the malicious file.
  • Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
    This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. The typical example is the file access. The attacker can leverage a file access race condition by "running the race", meaning that he would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the attacker could do something such as replace the file and cause an escalation of privilege.

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 familySuSE Local Security Checks
    NASL idOPENSUSE-2019-2506.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 id131060
    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/131060
    titleopenSUSE Security Update : xen (openSUSE-2019-2506)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2019-2506.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(131060);
  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-2019-18424", "CVE-2019-18425");
  script_xref(name:"IAVB", value:"2019-B-0084-S");

  script_name(english:"openSUSE Security Update : xen (openSUSE-2019-2506)");
  script_summary(english:"Check for the openSUSE-2019-2506 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-2019-18425: 32-bit PV guest user mode could elevate
    its privileges to that of the guest kernel.
    (bsc#1154456).

  - CVE-2019-18421: A malicious PV guest administrator may
    have been able to escalate their privilege to that of
    the host. (bsc#1154458).

  - CVE-2019-18420: Malicious x86 PV guests may have caused
    a hypervisor crash, resulting in a Denial of Service
    (Dos). (bsc#1154448)

This update was imported from the SUSE:SLE-15:Update update project."
  );
  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=1154461"
  );
  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:15.0");

  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\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", 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:"SUSE15.0", reference:"xen-debugsource-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"xen-devel-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"xen-libs-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"xen-libs-debuginfo-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"xen-tools-domU-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"xen-tools-domU-debuginfo-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"xen-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"xen-doc-html-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"xen-libs-32bit-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"xen-libs-32bit-debuginfo-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"xen-tools-4.10.4_06-lp150.2.25.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"xen-tools-debuginfo-4.10.4_06-lp150.2.25.1") ) 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 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 familySuSE Local Security Checks
    NASL idSUSE_SU-2019-2960-1.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 id130958
    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/130958
    titleSUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2019:2960-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:2960-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(130958);
  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-2019-18424", "CVE-2019-18425");
  script_xref(name:"IAVB", value:"2019-B-0084-S");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : xen (SUSE-SU-2019:2960-1)");
  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-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-2019-18425: 32-bit PV guest user mode could elevate its privileges
to that of the guest kernel. (bsc#1154456).

CVE-2019-18421: A malicious PV guest administrator may have been able
to escalate their privilege to that of the host. (bsc#1154458).

CVE-2019-18420: Malicious x86 PV guests may have caused a hypervisor
crash, resulting in a Denial of Service (Dos). (bsc#1154448)

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=1152497"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1154448"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1154456"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1154458"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1154461"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1155945"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-12207/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-11135/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18420/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18421/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18424/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2019-18425/"
  );
  # https://www.suse.com/support/update/announcement/2019/suse-su-20192960-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?4582dbcf"
  );
  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-15-2019-2960=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch
SUSE-SLE-Module-Basesystem-15-2019-2960=1"
  );
  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: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:"2019/11/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/13");
  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/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_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-debugsource-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-devel-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-debuginfo-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-debugsource-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-libs-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-libs-debuginfo-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-debugsource-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-libs-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-libs-debuginfo-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-4.10.4_06-3.25.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.10.4_06-3.25.1")) 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 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-2019-3297-1.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 familySuSE Local Security Checks
    NASL idSUSE_SU-2019-2962-1.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 id130960
    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/130960
    titleSUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2019:2962-1)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2020-0388-1.NASL
    descriptionThis update for xen fixes the following issues : CVE-2018-12207: Fixed a race condition where untrusted virtual machines could have been using 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-2018-19965: Fixed a DoS from attempting to use INVPCID with a non-canonical addresses (bsc#1115045 XSA-279). CVE-2019-11135: Aborting an asynchronous TSX operation on Intel CPUs with Transactional Memory support could be used to facilitate side-channel information leaks out of microarchitectural buffers, similar to the previously described
    last seen2020-03-18
    modified2020-02-18
    plugin id133763
    published2020-02-18
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133763
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2020:0388-1)
  • 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-2020-0334-1.NASL
    descriptionThis update for xen fixes the following issues : CVE-2020-7211: potential directory traversal using relative paths via tftp server on Windows host (bsc#1161181). CVE-2019-19579: Device quarantine for alternate pci assignment methods (bsc#1157888). CVE-2019-19581: find_next_bit() issues (bsc#1158003). CVE-2019-19583: VMentry failure with debug exceptions and blocked states (bsc#1158004). CVE-2019-19578: Linear pagetable use / entry miscounts (bsc#1158005). CVE-2019-19580: Further issues with restartable PV type change operations (bsc#1158006). CVE-2019-19577: dynamic height for the IOMMU pagetables (bsc#1158007). CVE-2019-18420: VCPUOP_initialise DoS (bsc#1154448). CVE-2019-18425: missing descriptor table limit checking in x86 PV emulation (bsc#1154456). CVE-2019-18421: Issues with restartable PV type change operations (bsc#1154458). CVE-2019-18424: passed through PCI devices may corrupt host memory after deassignment (bsc#1154461). CVE-2018-12207: Machine Check Error Avoidance on Page Size Change (aka IFU issue) (bsc#1155945). CVE-2019-11135: TSX Asynchronous Abort (TAA) issue (bsc#1152497). 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 id133539
    published2020-02-07
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/133539
    titleSUSE SLES12 Security Update : xen (SUSE-SU-2020:0334-1)
  • NASL familyMisc.
    NASL idXEN_SERVER_XSA-299.NASL
    descriptionAccording to its self-reported version number, the Xen hypervisor installed on the remote host is affected by an elevation of privilege vulnerability due to race conditions in the pagetable promotion and demotion operations. An authenticated, remote attacker can exploit this issue, by triggering race conditions and cause Xen to drop or retain extra type counts, to get write access to in-use pagetables and potentially gain elevated privileges. 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 id131133
    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/131133
    titleXen Restartable PV Type Change Operations Elevation of Privilege Vulnerability (XSA-299)
  • 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)

References