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

#
# (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");
}

#
# (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");
}

#
# (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");
}

#
# (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");
}