Vulnerabilities > CVE-2018-20191 - NULL Pointer Dereference vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
network
low complexity
qemu
canonical
fedoraproject
CWE-476
nessus

Summary

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Vulnerable Configurations

Part Description Count
Application
Qemu
283
OS
Canonical
4
OS
Fedoraproject
2

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-0664C7724D.NASL
    description - fix crash with virgl enabled (bz #1692323) - linux-user: make pwrite64/pread64(fd, NULL, 0, offset) return 0 (bz #1174267) - Fix build with latest gluster (bz #1684298) - CVE-2018-20123: pvrdma: memory leakage in device hotplug (bz #1658964) - CVE-2018-16872: usb-mtp: path traversal issue (bz #1659150) - CVE-2018-20191: pvrdma: uar_read leads to NULL deref (bz #1660315) - CVE-2019-6501: scsi-generic: possible OOB access (bz #1669005) - CVE-2019-6778: slirp: heap buffer overflow (bz #1669072) - CVE-2019-3812: Out-of-bounds read in hw/i2c/i2c-ddc.c allows for memory disclosure (bz #1678081) 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 id124467
    published2019-05-02
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/124467
    titleFedora 30 : 2:qemu (2019-0664c7724d)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2019-0664c7724d.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(124467);
      script_version("1.3");
      script_cvs_date("Date: 2020/01/21");
    
      script_cve_id("CVE-2018-16872", "CVE-2018-20123", "CVE-2018-20191", "CVE-2019-3812", "CVE-2019-6501", "CVE-2019-6778");
      script_xref(name:"FEDORA", value:"2019-0664c7724d");
    
      script_name(english:"Fedora 30 : 2:qemu (2019-0664c7724d)");
      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:
    "  - fix crash with virgl enabled (bz #1692323)
    
      - linux-user: make pwrite64/pread64(fd, NULL, 0, offset)
        return 0 (bz #1174267)
    
      - Fix build with latest gluster (bz #1684298)
    
      - CVE-2018-20123: pvrdma: memory leakage in device hotplug
        (bz #1658964)
    
      - CVE-2018-16872: usb-mtp: path traversal issue (bz
        #1659150)
    
      - CVE-2018-20191: pvrdma: uar_read leads to NULL deref (bz
        #1660315)
    
      - CVE-2019-6501: scsi-generic: possible OOB access (bz
        #1669005)
    
      - CVE-2019-6778: slirp: heap buffer overflow (bz #1669072)
    
      - CVE-2019-3812: Out-of-bounds read in hw/i2c/i2c-ddc.c
        allows for memory disclosure (bz #1678081)
    
    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-2019-0664c7724d"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected 2:qemu package."
      );
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/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-2019-6778");
      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:2:qemu");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:30");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/13");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/03/28");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/02");
      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:"qemu-3.1.0-6.fc30", epoch:"2")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        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, "2:qemu");
    }
    
  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3923-1.NASL
    descriptionMichael Hanselmann discovered that QEMU incorrectly handled the Media Transfer Protocol (MTP). An attacker inside the guest could use this issue to read or write arbitrary files and cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.10. (CVE-2018-16867) Michael Hanselmann discovered that QEMU incorrectly handled the Media Transfer Protocol (MTP). An attacker inside the guest could use this issue to read arbitrary files, contrary to expectations. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16872) Zhibin Hu discovered that QEMU incorrectly handled the Plan 9 File System support. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2018-19489) Li Quang and Saar Amar discovered multiple issues in the QEMU PVRDMA device. An attacker inside the guest could use these issues to cause a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.10. These issues were resolved by disabling PVRDMA support in Ubuntu 18.10. (CVE-2018-20123, CVE-2018-20124, CVE-2018-20125, CVE-2018-20126, CVE-2018-20191, CVE-2018-20216) Michael Hanselmann discovered that QEMU incorrectly handled certain i2c commands. A local attacker could possibly use this issue to read QEMU process memory. This issue only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2019-3812) It was discovered that QEMU incorrectly handled the Slirp networking back-end. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code on the host. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. (CVE-2019-6778). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu 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 id123457
    published2019-03-28
    reporterUbuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123457
    titleUbuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : qemu vulnerabilities (USN-3923-1)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were
    # extracted from Ubuntu Security Notice USN-3923-1. The text 
    # itself is copyright (C) Canonical, Inc. See 
    # <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
    # trademark of Canonical, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(123457);
      script_version("1.3");
      script_cvs_date("Date: 2020/01/27");
    
      script_cve_id("CVE-2018-16867", "CVE-2018-16872", "CVE-2018-19489", "CVE-2018-20123", "CVE-2018-20124", "CVE-2018-20125", "CVE-2018-20126", "CVE-2018-20191", "CVE-2018-20216", "CVE-2019-3812", "CVE-2019-6778");
      script_xref(name:"USN", value:"3923-1");
    
      script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : qemu vulnerabilities (USN-3923-1)");
      script_summary(english:"Checks dpkg output for updated packages.");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:
    "The remote Ubuntu host is missing one or more security-related
    patches."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "Michael Hanselmann discovered that QEMU incorrectly handled the Media
    Transfer Protocol (MTP). An attacker inside the guest could use this
    issue to read or write arbitrary files and cause a denial of service,
    or possibly execute arbitrary code. This issue only affected Ubuntu
    18.10. (CVE-2018-16867)
    
    Michael Hanselmann discovered that QEMU incorrectly handled the Media
    Transfer Protocol (MTP). An attacker inside the guest could use this
    issue to read arbitrary files, contrary to expectations. This issue
    only affected Ubuntu 18.04 LTS and Ubuntu 18.10. (CVE-2018-16872)
    
    Zhibin Hu discovered that QEMU incorrectly handled the Plan 9 File
    System support. An attacker inside the guest could use this issue to
    cause QEMU to crash, resulting in a denial of service.
    (CVE-2018-19489)
    
    Li Quang and Saar Amar discovered multiple issues in the QEMU PVRDMA
    device. An attacker inside the guest could use these issues to cause a
    denial of service, or possibly execute arbitrary code. This issue only
    affected Ubuntu 18.10. These issues were resolved by disabling PVRDMA
    support in Ubuntu 18.10. (CVE-2018-20123, CVE-2018-20124,
    CVE-2018-20125, CVE-2018-20126, CVE-2018-20191, CVE-2018-20216)
    
    Michael Hanselmann discovered that QEMU incorrectly handled certain
    i2c commands. A local attacker could possibly use this issue to read
    QEMU process memory. This issue only affected Ubuntu 18.04 LTS and
    Ubuntu 18.10. (CVE-2019-3812)
    
    It was discovered that QEMU incorrectly handled the Slirp networking
    back-end. An attacker inside the guest could use this issue to cause
    QEMU to crash, resulting in a denial of service, or possibly execute
    arbitrary code on the host. In the default installation, when QEMU is
    used with libvirt, attackers would be isolated by the libvirt AppArmor
    profile. (CVE-2019-6778).
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the Ubuntu 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://usn.ubuntu.com/3923-1/"
      );
      script_set_attribute(attribute:"solution", value:"Update the affected packages.");
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/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-2019-6778");
      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:canonical:ubuntu_linux:qemu-system");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-aarch64");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-arm");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-data");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-gui");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-mips");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-misc");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-ppc");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-s390x");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-sparc");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qemu-system-x86");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.10");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/12");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/03/27");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/28");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"Ubuntu Security Notice (C) 2019-2020 Canonical, Inc. / NASL script (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
      script_family(english:"Ubuntu Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");
    
      exit(0);
    }
    
    
    include("audit.inc");
    include("ubuntu.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    release = get_kb_item("Host/Ubuntu/release");
    if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
    release = chomp(release);
    if (! preg(pattern:"^(14\.04|16\.04|18\.04|18\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 18.04 / 18.10", "Ubuntu " + release);
    if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);
    
    flag = 0;
    
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-aarch64", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-arm", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-mips", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-misc", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-ppc", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-sparc", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"14.04", pkgname:"qemu-system-x86", pkgver:"2.0.0+dfsg-2ubuntu1.45")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-aarch64", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-arm", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-mips", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-misc", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-ppc", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-s390x", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-sparc", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"16.04", pkgname:"qemu-system-x86", pkgver:"1:2.5+dfsg-5ubuntu10.36")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system-arm", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system-mips", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system-misc", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system-ppc", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system-s390x", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system-sparc", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.04", pkgname:"qemu-system-x86", pkgver:"1:2.11+dfsg-1ubuntu7.12")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-arm", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-data", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-gui", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-mips", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-misc", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-ppc", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-s390x", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-sparc", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    if (ubuntu_check(osver:"18.10", pkgname:"qemu-system-x86", pkgver:"1:2.12+dfsg-3ubuntu8.6")) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        extra      : ubuntu_report_get()
      );
      exit(0);
    }
    else
    {
      tested = ubuntu_pkg_tests_get();
      if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
      else audit(AUDIT_PACKAGE_NOT_INSTALLED, "qemu-system / qemu-system-aarch64 / qemu-system-arm / etc");
    }
    
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2019-88A98CE795.NASL
    description - CVE-2018-19364: 9pfs: use-after-free (bz #1651359) - CVE-2018-19489: 9pfs: use-after-free renaming files (bz #1653157) - CVE-2018-16867: usb-mtp: path traversal issue (bz #1656746) - CVE-2018-16872: usb-mtp: path traversal issue (bz #1659150) - CVE-2018-20191: pvrdma: uar_read leads to NULL deref (bz #1660315) - CVE-2019-6778: slirp: heap buffer overflow (bz #1669072) - CVE-2019-3812: Out-of-bounds read in hw/i2c/i2c-ddc.c allows for memory disclosure (bz #1678081) 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 id123101
    published2019-03-26
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123101
    titleFedora 29 : 2:qemu (2019-88a98ce795)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    # The descriptive text and package checks in this plugin were  
    # extracted from Fedora Security Advisory FEDORA-2019-88a98ce795.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(123101);
      script_version("1.3");
      script_cvs_date("Date: 2020/02/03");
    
      script_cve_id("CVE-2018-16867", "CVE-2018-16872", "CVE-2018-19364", "CVE-2018-19489", "CVE-2018-20191", "CVE-2019-3812", "CVE-2019-6778");
      script_xref(name:"FEDORA", value:"2019-88a98ce795");
    
      script_name(english:"Fedora 29 : 2:qemu (2019-88a98ce795)");
      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:
    "  - CVE-2018-19364: 9pfs: use-after-free (bz #1651359)
    
      - CVE-2018-19489: 9pfs: use-after-free renaming files (bz
        #1653157)
    
      - CVE-2018-16867: usb-mtp: path traversal issue (bz
        #1656746)
    
      - CVE-2018-16872: usb-mtp: path traversal issue (bz
        #1659150)
    
      - CVE-2018-20191: pvrdma: uar_read leads to NULL deref (bz
        #1660315)
    
      - CVE-2019-6778: slirp: heap buffer overflow (bz #1669072)
    
      - CVE-2019-3812: Out-of-bounds read in hw/i2c/i2c-ddc.c
        allows for memory disclosure (bz #1678081)
    
    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-2019-88a98ce795"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Update the affected 2:qemu package."
      );
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/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-2019-6778");
      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:2:qemu");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:29");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2018/12/12");
      script_set_attribute(attribute:"patch_publication_date", value:"2019/03/25");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/26");
      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:"^29([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 29", "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:"FC29", reference:"qemu-3.0.0-4.fc29", epoch:"2")) flag++;
    
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        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, "2:qemu");
    }
    
  • NASL familyHuawei Local Security Checks
    NASL idEULEROS_SA-2019-1815.NASL
    descriptionAccording to the versions of the qemu-kvm packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : - A flaw was found in QEMU
    last seen2020-05-03
    modified2019-08-27
    plugin id128184
    published2019-08-27
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/128184
    titleEulerOS 2.0 SP8 : qemu-kvm (EulerOS-SA-2019-1815)
    code
    #
    # (C) Tenable Network Security, Inc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(128184);
      script_version("1.3");
      script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/01");
    
      script_cve_id(
        "CVE-2018-16867",
        "CVE-2018-16872",
        "CVE-2018-19364",
        "CVE-2018-19489",
        "CVE-2018-20191",
        "CVE-2019-3812",
        "CVE-2019-6778"
      );
    
      script_name(english:"EulerOS 2.0 SP8 : qemu-kvm (EulerOS-SA-2019-1815)");
      script_summary(english:"Checks the rpm output for the updated packages.");
    
      script_set_attribute(attribute:"synopsis", value:
    "The remote EulerOS host is missing multiple security updates.");
      script_set_attribute(attribute:"description", value:
    "According to the versions of the qemu-kvm packages installed, the
    EulerOS installation on the remote host is affected by the following
    vulnerabilities :
    
      - A flaw was found in QEMU's Media Transfer Protocol
        (MTP) where a path traversal in the in
        usb_mtp_write_data function in hw/usb/dev-mtp.c due to
        an improper file name sanitization. Reading and writing
        of arbitrary files is allowed when a guest device is
        mounted which may lead to a denial of service scenario
        or possibly lead to code execution on the
        host.(CVE-2018-16867)
    
      - A flaw was found in QEMU's Media Transfer Protocol
        (MTP). The code opening files in usb_mtp_get_object and
        usb_mtp_get_partial_object and directories in
        usb_mtp_object_readdir doesn't consider that the
        underlying filesystem may have changed since the time
        lstat(2) was called in usb_mtp_object_alloc, a
        classical TOCTTOU problem. An attacker with write
        access to the host filesystem, shared with a guest, can
        use this property to navigate the host filesystem in
        the context of the QEMU process and read any file the
        QEMU process has access to. Access to the filesystem
        may be local or via a network share protocol such as
        CIFS.(CVE-2018-16872)
    
      - hw/9pfs/cofile.c and hw/9pfs/9p.c in QEMU can modify an
        fid path while it is being accessed by a second thread,
        leading to (for example) a use-after-free
        outcome.(CVE-2018-19364)
    
      - v9fs_wstat in hw/9pfs/9p.c in QEMU allows guest OS
        users to cause a denial of service (crash) because of a
        race condition during file renaming.(CVE-2018-19489)
    
      - hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a
        read operation (such as uar_read by analogy to
        uar_write), which allows attackers to cause a denial of
        service (NULL pointer dereference).(CVE-2018-20191)
    
      - QEMU, through version 2.10 and through version 3.1.0,
        is vulnerable to an out-of-bounds read of up to 128
        bytes in the hw/i2c/i2c-ddc.c:i2c_ddc() function. A
        local attacker with permission to execute i2c commands
        could exploit this to read stack memory of the qemu
        process on the host.(CVE-2019-3812)
    
      - In QEMU 3.0.0, tcp_emu in slirp/tcp_subr.c has a
        heap-based buffer overflow.(CVE-2019-6778)
    
    Note that Tenable Network Security has extracted the preceding
    description block directly from the EulerOS security advisory. Tenable
    has attempted to automatically clean and format it as much as possible
    without introducing additional issues.");
      # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-1815
      script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9661b617");
      script_set_attribute(attribute:"solution", value:
    "Update the affected qemu-kvm packages.");
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
      script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
      script_set_cvss3_base_vector("CVSS:3.0/AV:L/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-2019-6778");
      script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
    
      script_set_attribute(attribute:"patch_publication_date", value:"2019/08/28");
      script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/27");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-alsa");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-oss");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-pa");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-audio-sdl");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-curl");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-dmg");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-gluster");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-iscsi");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-nfs");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-rbd");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-block-ssh");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-common");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-img");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-kvm");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-system-aarch64");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-system-aarch64-core");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-curses");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-gtk");
      script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:qemu-ui-sdl");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
      script_set_attribute(attribute:"generated_plugin", value:"current");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_family(english:"Huawei Local Security Checks");
    
      script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
      script_exclude_keys("Host/EulerOS/uvp_version");
    
      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/EulerOS/release");
    if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
    if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
    
    sp = get_kb_item("Host/EulerOS/sp");
    if (isnull(sp) || sp !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");
    
    uvp = get_kb_item("Host/EulerOS/uvp_version");
    if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "EulerOS UVP " + uvp);
    
    if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
    if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);
    
    flag = 0;
    
    pkgs = ["qemu-audio-alsa-3.0.0-4.h1.eulerosv2r8",
            "qemu-audio-oss-3.0.0-4.h1.eulerosv2r8",
            "qemu-audio-pa-3.0.0-4.h1.eulerosv2r8",
            "qemu-audio-sdl-3.0.0-4.h1.eulerosv2r8",
            "qemu-block-curl-3.0.0-4.h1.eulerosv2r8",
            "qemu-block-dmg-3.0.0-4.h1.eulerosv2r8",
            "qemu-block-gluster-3.0.0-4.h1.eulerosv2r8",
            "qemu-block-iscsi-3.0.0-4.h1.eulerosv2r8",
            "qemu-block-nfs-3.0.0-4.h1.eulerosv2r8",
            "qemu-block-rbd-3.0.0-4.h1.eulerosv2r8",
            "qemu-block-ssh-3.0.0-4.h1.eulerosv2r8",
            "qemu-common-3.0.0-4.h1.eulerosv2r8",
            "qemu-img-3.0.0-4.h1.eulerosv2r8",
            "qemu-kvm-3.0.0-4.h1.eulerosv2r8",
            "qemu-system-aarch64-3.0.0-4.h1.eulerosv2r8",
            "qemu-system-aarch64-core-3.0.0-4.h1.eulerosv2r8",
            "qemu-ui-curses-3.0.0-4.h1.eulerosv2r8",
            "qemu-ui-gtk-3.0.0-4.h1.eulerosv2r8",
            "qemu-ui-sdl-3.0.0-4.h1.eulerosv2r8"];
    
    foreach (pkg in pkgs)
      if (rpm_check(release:"EulerOS-2.0", sp:"8", reference:pkg)) flag++;
    
    if (flag)
    {
      security_report_v4(
        port       : 0,
        severity   : SECURITY_WARNING,
        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, "qemu-kvm");
    }