Vulnerabilities > CVE-2017-13721 - Improper Privilege Management vulnerability in multiple products

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3453-1. 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(103834);
  script_version("3.8");
  script_cvs_date("Date: 2019/09/18 12:31:47");

  script_cve_id("CVE-2017-13721", "CVE-2017-13723");
  script_xref(name:"USN", value:"3453-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : xorg-server, xorg-server-hwe-16.04, xorg-server-lts-xenial vulnerabilities (USN-3453-1)");
  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:
"Michal Srb discovered that the X.Org X server incorrectly handled
shared memory segments. An attacker able to connect to an X server,
either locally or remotely, could use this issue to crash the server,
or possibly replace shared memory segments of other X clients in the
same session. (CVE-2017-13721)

Michal Srb discovered that the X.Org X server incorrectly handled XKB
buffers. An attacker able to connect to an X server, either locally or
remotely, could use this issue to crash the server, or possibly
execute arbitrary code. (CVE-2017-13723).

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/3453-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected xserver-xorg-core, xserver-xorg-core-hwe-16.04 and
/ or xserver-xorg-core-lts-xenial 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:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-hwe-16.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:xserver-xorg-core-lts-xenial");
  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:17.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/10/13");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 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|17\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 17.04", "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:"xserver-xorg-core", pkgver:"2:1.15.1-0ubuntu2.10")) flag++;
if (ubuntu_check(osver:"14.04", pkgname:"xserver-xorg-core-lts-xenial", pkgver:"2:1.18.3-1ubuntu2.3~trusty3")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"xserver-xorg-core", pkgver:"2:1.18.4-0ubuntu0.6")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"xserver-xorg-core-hwe-16.04", pkgver:"2:1.19.3-1ubuntu1~16.04.3")) flag++;
if (ubuntu_check(osver:"17.04", pkgname:"xserver-xorg-core", pkgver:"2:1.19.3-1ubuntu1.2")) 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, "xserver-xorg-core / xserver-xorg-core-hwe-16.04 / etc");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2017:3047-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(104776);
  script_version("3.10");
  script_cvs_date("Date: 2019/09/11 11:22:16");

  script_cve_id("CVE-2017-12176", "CVE-2017-12177", "CVE-2017-12178", "CVE-2017-12179", "CVE-2017-12180", "CVE-2017-12181", "CVE-2017-12182", "CVE-2017-12183", "CVE-2017-12184", "CVE-2017-12185", "CVE-2017-12186", "CVE-2017-12187", "CVE-2017-13721", "CVE-2017-13723");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : xorg-x11-server (SUSE-SU-2017:3047-1)");
  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 xorg-x11-server fixes several issues. These security
issues were fixed :

  - CVE-2017-13721: Missing validation of shmseg resource id
    in Xext/XShm could lead to shared memory segments of
    other users beeing freed (bnc#1052984)

  - CVE-2017-13723: A local denial of service via unusual
    characters in XkbAtomText and XkbStringText was fixed
    (bnc#1051150)

  -
    CVE-2017-12184,CVE-2017-12185,CVE-2017-12186,CVE-2017-12
    187: Fixed unvalidated lengths in multiple extensions
    (bsc#1063034)

  - CVE-2017-12183: Fixed some unvalidated lengths in the
    XFIXES extension. (bsc#1063035)

  - CVE-2017-12180,CVE-2017-12181,CVE-2017-12182: Fixed
    various unvalidated lengths in the
    XFree86-VidMode/XFree86-DGA/XFree86-DRI extensions
    (bsc#1063037)

  - CVE-2017-12179: Fixed an integer overflow and
    unvalidated length in (S)ProcXIBarrierReleasePointer in
    Xi (bsc#1063038)

  - CVE-2017-12178: Fixed a wrong extra length check in
    ProcXIChangeHierarchy in Xi (bsc#1063039)

  - CVE-2017-12177: Fixed an unvalidated variable-length
    request in ProcDbeGetVisualInfo (bsc#1063040)

  - CVE-2017-12176: Fixed an unvalidated extra length in
    ProcEstablishConnection (bsc#1063041)

The update package also includes non-security fixes. See advisory for
details.

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=1022727"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1051150"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1052984"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1061107"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063034"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063035"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063037"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063038"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063039"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063040"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1063041"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12176/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12177/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12178/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12179/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12180/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12181/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12182/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12183/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12184/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12185/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12186/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-12187/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-13721/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-13723/"
  );
  # https://www.suse.com/support/update/announcement/2017/suse-su-20173047-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0d59c93a"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Software Development Kit 12-SP3:zypper in -t
patch SUSE-SLE-SDK-12-SP3-2017-1884=1

SUSE Linux Enterprise Software Development Kit 12-SP2:zypper in -t
patch SUSE-SLE-SDK-12-SP2-2017-1884=1

SUSE Linux Enterprise Server for Raspberry Pi 12-SP2:zypper in -t
patch SUSE-SLE-RPI-12-SP2-2017-1884=1

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2017-1884=1

SUSE Linux Enterprise Server 12-SP2:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2017-1884=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP3-2017-1884=1

SUSE Linux Enterprise Desktop 12-SP2:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP2-2017-1884=1

To bring your system up-to-date, use 'zypper patch'."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/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: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:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xorg-x11-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xorg-x11-server-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xorg-x11-server-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xorg-x11-server-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xorg-x11-server-extra-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/11/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/27");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 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:"^(SLED12|SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED12 / SLES12", "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);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(2|3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2/3", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(2|3)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP2/3", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"3", reference:"xorg-x11-server-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"xorg-x11-server-debuginfo-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"xorg-x11-server-debugsource-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"xorg-x11-server-extra-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"xorg-x11-server-extra-debuginfo-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"xorg-x11-server-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"xorg-x11-server-debuginfo-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"xorg-x11-server-debugsource-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"xorg-x11-server-extra-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"2", reference:"xorg-x11-server-extra-debuginfo-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xorg-x11-server-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xorg-x11-server-debuginfo-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xorg-x11-server-debugsource-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xorg-x11-server-extra-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xorg-x11-server-extra-debuginfo-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"xorg-x11-server-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"xorg-x11-server-debuginfo-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"xorg-x11-server-debugsource-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"xorg-x11-server-extra-7.6_1.18.3-76.15.2")) flag++;
if (rpm_check(release:"SLED12", sp:"2", cpu:"x86_64", reference:"xorg-x11-server-extra-debuginfo-7.6_1.18.3-76.15.2")) 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, "xorg-x11-server");
}

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(132218);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/07");

  script_cve_id(
    "CVE-2017-10971",
    "CVE-2017-10972",
    "CVE-2017-12176",
    "CVE-2017-12177",
    "CVE-2017-12178",
    "CVE-2017-12179",
    "CVE-2017-12180",
    "CVE-2017-12181",
    "CVE-2017-12182",
    "CVE-2017-12183",
    "CVE-2017-12184",
    "CVE-2017-12185",
    "CVE-2017-12186",
    "CVE-2017-12187",
    "CVE-2017-13721",
    "CVE-2017-2624",
    "CVE-2018-14665"
  );

  script_name(english:"EulerOS 2.0 SP3 : xorg-x11-server (EulerOS-SA-2019-2683)");
  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 xorg-x11-server packages installed,
the EulerOS installation on the remote host is affected by the
following vulnerabilities :

  - A flaw was found in xorg-x11-server before 1.20.3. An
    incorrect permission check for -modulepath and -logfile
    options when starting Xorg. X server allows
    unprivileged users with the ability to log in to the
    system via physical console to escalate their
    privileges and run arbitrary code under root
    privileges.(CVE-2018-14665)

  - In the X.Org X server before 2017-06-19, a user
    authenticated to an X Session could crash or execute
    code in the context of the X Server by exploiting a
    stack overflow in the endianness conversion of X
    Events.(CVE-2017-10971)

  - In X.Org Server (aka xserver and xorg-server) before
    1.19.4, an attacker authenticated to an X server with
    the X shared memory extension enabled can cause aborts
    of the X server or replace shared memory segments of
    other X clients in the same session.(CVE-2017-13721)

  - It was found that xorg-x11-server before 1.19.0
    including uses memcmp() to check the received MIT
    cookie against a series of valid cookies. If the cookie
    is correct, it is allowed to attach to the Xorg
    session. Since most memcmp() implementations return
    after an invalid byte is seen, this causes a time
    difference between a valid and invalid byte, which
    could allow an efficient brute force
    attack.(CVE-2017-2624)

  - Uninitialized data in endianness conversion in the
    XEvent handling of the X.Org X Server before 2017-06-19
    allowed authenticated malicious users to access
    potentially privileged data from the X
    server.(CVE-2017-10972)

  - xorg-x11-server before 1.19.5 had wrong extra length
    check in ProcXIChangeHierarchy function allowing
    malicious X client to cause X server to crash or
    possibly execute arbitrary code.(CVE-2017-12178)

  - xorg-x11-server before 1.19.5 was missing extra length
    validation in ProcEstablishConnection function allowing
    malicious X client to cause X server to crash or
    possibly execute arbitrary code.(CVE-2017-12176)

  - xorg-x11-server before 1.19.5 was missing length
    validation in MIT-SCREEN-SAVER extension allowing
    malicious X client to cause X server to crash or
    possibly execute arbitrary code.(CVE-2017-12185)

  - xorg-x11-server before 1.19.5 was missing length
    validation in RENDER extension allowing malicious X
    client to cause X server to crash or possibly execute
    arbitrary code.(CVE-2017-12187)

  - xorg-x11-server before 1.19.5 was missing length
    validation in XFIXES extension allowing malicious X
    client to cause X server to crash or possibly execute
    arbitrary code.(CVE-2017-12183)

  - xorg-x11-server before 1.19.5 was missing length
    validation in XFree86 DGA extension allowing malicious
    X client to cause X server to crash or possibly execute
    arbitrary code.(CVE-2017-12181)

  - xorg-x11-server before 1.19.5 was missing length
    validation in XFree86 DRI extension allowing malicious
    X client to cause X server to crash or possibly execute
    arbitrary code.(CVE-2017-12182)

  - xorg-x11-server before 1.19.5 was missing length
    validation in XFree86 VidModeExtension allowing
    malicious X client to cause X server to crash or
    possibly execute arbitrary code.(CVE-2017-12180)

  - xorg-x11-server before 1.19.5 was missing length
    validation in XINERAMA extension allowing malicious X
    client to cause X server to crash or possibly execute
    arbitrary code.(CVE-2017-12184)

  - xorg-x11-server before 1.19.5 was missing length
    validation in X-Resource extension allowing malicious X
    client to cause X server to crash or possibly execute
    arbitrary code.(CVE-2017-12186)

  - xorg-x11-server before 1.19.5 was vulnerable to integer
    overflow in (S)ProcXIBarrierReleasePointer functions
    allowing malicious X client to cause X server to crash
    or possibly execute arbitrary code.(CVE-2017-12179)

  - xorg-x11-server before 1.19.5 was vulnerable to integer
    overflow in ProcDbeGetVisualInfo function allowing
    malicious X client to cause X server to crash or
    possibly execute arbitrary code.(CVE-2017-12177)

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-2019-2683
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?46718661");
  script_set_attribute(attribute:"solution", value:
"Update the affected xorg-x11-server packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Xorg X11 Server SUID modulepath Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"patch_publication_date", value:"2019/12/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:xorg-x11-server-Xephyr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:xorg-x11-server-Xorg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:xorg-x11-server-common");
  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 !~ "^(3)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP3");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP3", "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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["xorg-x11-server-Xephyr-1.17.2-10.h6",
        "xorg-x11-server-Xorg-1.17.2-10.h6",
        "xorg-x11-server-common-1.17.2-10.h6"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"3", reference:pkg)) 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, "xorg-x11-server");
}