Vulnerabilities > CVE-2018-14424 - Use After Free vulnerability in Gnome Display Manager

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
gnome
CWE-416
nessus
NVD
Published: 2018-08-14
Updated: 2018-10-18

Summary

The daemon in GDM through 3.29.1 does not properly unexport display objects from its D-Bus interface when they are destroyed, which allows a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution.

Vulnerable Configurations

Part Description Count
Application
Gnome
249

Common Weakness Enumeration (CWE)

Nessus

  • NASL familyUbuntu Local Security Checks
    NASL idUBUNTU_USN-3737-1.NASL
    descriptionA use-after-free was discovered in GDM. A local user could exploit this to cause a denial of service, or potentially execute arbitrary code as the administrator. 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 id111673
    published2018-08-14
    reporterUbuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111673
    titleUbuntu 18.04 LTS : gdm3 vulnerability (USN-3737-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3737-1. 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(111673);
  script_version("1.4");
  script_cvs_date("Date: 2019/09/18 12:31:48");

  script_cve_id("CVE-2018-14424");
  script_xref(name:"USN", value:"3737-1");

  script_name(english:"Ubuntu 18.04 LTS : gdm3 vulnerability (USN-3737-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A use-after-free was discovered in GDM. A local user could exploit
this to cause a denial of service, or potentially execute arbitrary
code as the administrator.

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/3737-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected gdm3 package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:gdm3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2018-2019 Canonical, Inc. / NASL script (C) 2018-2019 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:"^(18\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 18.04", "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:"18.04", pkgname:"gdm3", pkgver:"3.28.2-0ubuntu1.4")) 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, "gdm3");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DLA-1494.NASL
    descriptionThe daemon in GDM does not properly unexport display objects from its D-Bus interface when they are destroyed, which allows a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution. For Debian 8
    last seen2020-06-01
    modified2020-06-02
    plugin id117295
    published2018-09-06
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/117295
    titleDebian DLA-1494-1 : gdm3 security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-1494-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(117295);
  script_version("1.2");
  script_cvs_date("Date: 2018/10/19  9:33:04");

  script_cve_id("CVE-2018-14424");

  script_name(english:"Debian DLA-1494-1 : gdm3 security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The daemon in GDM does not properly unexport display objects from its
D-Bus interface when they are destroyed, which allows a local attacker
to trigger a use-after-free via a specially crafted sequence of D-Bus
method calls, resulting in a denial of service or potential code
execution.

For Debian 8 'Jessie', this problem has been fixed in version
3.14.1-7+deb8u1.

We recommend that you upgrade your gdm3 packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA 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://lists.debian.org/debian-lts-announce/2018/09/msg00003.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/jessie/gdm3"
  );
  script_set_attribute(attribute:"solution", value:"Upgrade the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:gdm3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:gir1.2-gdm3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgdm-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libgdm1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/09/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/06");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"gdm3", reference:"3.14.1-7+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"gir1.2-gdm3", reference:"3.14.1-7+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libgdm-dev", reference:"3.14.1-7+deb8u1")) flag++;
if (deb_check(release:"8.0", prefix:"libgdm1", reference:"3.14.1-7+deb8u1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2019-708.NASL
    descriptionThis update for gdm provides the following fixes : This security issue was fixed : - CVE-2018-14424: The daemon in GDM did not properly unexport display objects from its D-Bus interface when they are destroyed, which allowed a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution (bsc#1103737) These non-security issues were fixed : - Enable pam_keyinit module (bsc#1081947) - Fix a build race in SLE (bsc#1103093) This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-01
    modified2020-06-02
    plugin id123308
    published2019-03-27
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/123308
    titleopenSUSE Security Update : gdm (openSUSE-2019-708)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2019-708.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(123308);
  script_version("1.2");
  script_cvs_date("Date: 2020/01/30");

  script_cve_id("CVE-2018-14424");

  script_name(english:"openSUSE Security Update : gdm (openSUSE-2019-708)");
  script_summary(english:"Check for the openSUSE-2019-708 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for gdm provides the following fixes :

This security issue was fixed :

  - CVE-2018-14424: The daemon in GDM did not properly
    unexport display objects from its D-Bus interface when
    they are destroyed, which allowed a local attacker to
    trigger a use-after-free via a specially crafted
    sequence of D-Bus method calls, resulting in a denial of
    service or potential code execution (bsc#1103737)

These non-security issues were fixed :

  - Enable pam_keyinit module (bsc#1081947)

  - Fix a build race in SLE (bsc#1103093)

This update was imported from the SUSE:SLE-15:Update update project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1081947"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1103093"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1103737"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected gdm 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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-branding-upstream");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-lang");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdmflexiserver");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libgdm1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libgdm1-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:typelib-1_0-Gdm-1_0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/03/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/03/27");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.0", reference:"gdm-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-branding-upstream-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-debuginfo-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-debugsource-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-devel-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-lang-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdmflexiserver-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libgdm1-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libgdm1-debuginfo-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"typelib-1_0-Gdm-1_0-3.26.2.1-lp150.11.3.1") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gdm / gdm-branding-upstream / gdm-debuginfo / gdm-debugsource / etc");
}
  • NASL familySuSE Local Security Checks
    NASL idOPENSUSE-2018-1037.NASL
    descriptionThis update for gdm provides the following fixes : This security issue was fixed : - CVE-2018-14424: The daemon in GDM did not properly unexport display objects from its D-Bus interface when they are destroyed, which allowed a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution (bsc#1103737) These non-security issues were fixed : - Enable pam_keyinit module (bsc#1081947) - Fix a build race in SLE (bsc#1103093) This update was imported from the SUSE:SLE-15:Update update project.
    last seen2020-06-05
    modified2018-09-25
    plugin id117685
    published2018-09-25
    reporterThis script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/117685
    titleopenSUSE Security Update : gdm (openSUSE-2018-1037)
    code
    #%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2018-1037.
#
# The text description of this plugin is (C) SUSE LLC.
#

include("compat.inc");

if (description)
{
  script_id(117685);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/04");

  script_cve_id("CVE-2018-14424");

  script_name(english:"openSUSE Security Update : gdm (openSUSE-2018-1037)");
  script_summary(english:"Check for the openSUSE-2018-1037 patch");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote openSUSE host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This update for gdm provides the following fixes :

This security issue was fixed :

  - CVE-2018-14424: The daemon in GDM did not properly
    unexport display objects from its D-Bus interface when
    they are destroyed, which allowed a local attacker to
    trigger a use-after-free via a specially crafted
    sequence of D-Bus method calls, resulting in a denial of
    service or potential code execution (bsc#1103737)

These non-security issues were fixed :

  - Enable pam_keyinit module (bsc#1081947)

  - Fix a build race in SLE (bsc#1103093)

This update was imported from the SUSE:SLE-15:Update update project."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1081947"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1103093"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1103737"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected gdm packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-branding-upstream");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdm-lang");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:gdmflexiserver");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libgdm1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libgdm1-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:typelib-1_0-Gdm-1_0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/09/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/25");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(x86_64)$") audit(AUDIT_ARCH_NOT, "x86_64", ourarch);

flag = 0;

if ( rpm_check(release:"SUSE15.0", reference:"gdm-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-branding-upstream-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-debuginfo-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-debugsource-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-devel-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdm-lang-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"gdmflexiserver-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libgdm1-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libgdm1-debuginfo-3.26.2.1-lp150.11.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"typelib-1_0-Gdm-1_0-3.26.2.1-lp150.11.3.1") ) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gdm / gdm-branding-upstream / gdm-debuginfo / gdm-debugsource / etc");
}
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-2771-1.NASL
    descriptionThis update for gdm provides the following fixes : This security issue was fixed : CVE-2018-14424: The daemon in GDM did not properly unexport display objects from its D-Bus interface when they are destroyed, which allowed a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution (bsc#1103737) 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.
    last seen2020-03-19
    modified2019-01-02
    plugin id120102
    published2019-01-02
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120102
    titleSUSE SLED15 / SLES15 Security Update : gdm (SUSE-SU-2018:2771-1)
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:2771-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(120102);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/18");

  script_cve_id("CVE-2018-14424");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : gdm (SUSE-SU-2018:2771-1)");
  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 gdm provides the following fixes :

This security issue was fixed :

CVE-2018-14424: The daemon in GDM did not properly unexport display
objects from its D-Bus interface when they are destroyed, which
allowed a local attacker to trigger a use-after-free via a specially
crafted sequence of D-Bus method calls, resulting in a denial of
service or potential code execution (bsc#1103737)

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=1081947"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1103093"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1103737"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-14424/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20182771-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?942abfc8"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Desktop Applications 15:zypper in -t
patch SUSE-SLE-Module-Desktop-Applications-15-2018-1939=1"
  );
  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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gdm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gdm-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gdm-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:gdm-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgdm1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libgdm1-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:typelib-1_0-Gdm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/09/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/02");
  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:"SuSE Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP0", os_ver + " SP" + sp);
if (os_ver == "SLED15" && (! preg(pattern:"^(0)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP0", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES15", sp:"0", reference:"gdm-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"gdm-debuginfo-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"gdm-debugsource-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"gdm-devel-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgdm1-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"libgdm1-debuginfo-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLES15", sp:"0", reference:"typelib-1_0-Gdm-1_0-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"gdm-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"gdm-debuginfo-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"gdm-debugsource-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"gdm-devel-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgdm1-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"libgdm1-debuginfo-3.26.2.1-13.9.1")) flag++;
if (rpm_check(release:"SLED15", sp:"0", reference:"typelib-1_0-Gdm-1_0-3.26.2.1-13.9.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "gdm");
}
  • NASL familyDebian Local Security Checks
    NASL idDEBIAN_DSA-4270.NASL
    descriptionChris Coulson discovered a use-after-free flaw in the GNOME Display Manager, triggerable by an unprivileged user via a specially crafted sequence of D-Bus method calls, leading to denial of service or potentially the execution of arbitrary code.
    last seen2020-06-01
    modified2020-06-02
    plugin id111668
    published2018-08-14
    reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/111668
    titleDebian DSA-4270-1 : gdm3 - security update
    code
    #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4270. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(111668);
  script_version("1.4");
  script_cvs_date("Date: 2018/11/13 12:30:47");

  script_cve_id("CVE-2018-14424");
  script_xref(name:"DSA", value:"4270");

  script_name(english:"Debian DSA-4270-1 : gdm3 - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Chris Coulson discovered a use-after-free flaw in the GNOME Display
Manager, triggerable by an unprivileged user via a specially crafted
sequence of D-Bus method calls, leading to denial of service or
potentially the execution of arbitrary code."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/gdm3"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/gdm3"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2018/dsa-4270"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the gdm3 packages.

For the stable distribution (stretch), this problem has been fixed in
version 3.22.3-3+deb9u2."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:gdm3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/14");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"gdm3", reference:"3.22.3-3+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"gir1.2-gdm-1.0", reference:"3.22.3-3+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libgdm-dev", reference:"3.22.3-3+deb9u2")) flag++;
if (deb_check(release:"9.0", prefix:"libgdm1", reference:"3.22.3-3+deb9u2")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2018-6740C38CF4.NASL
    descriptiongdm 3.28.3 release, fixing CVE-2018-14424. - CVE-2018-14424 - double free fix - lifecycle fixes to libgdm/GdmClient - follow up fixes dealing with login screen reaping form last release - allow pam modules to use SIGUSR1 - set PWD for user session - tell cirrus not to use wayland - Translation updates 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 seen2020-06-05
    modified2019-01-03
    plugin id120483
    published2019-01-03
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/120483
    titleFedora 28 : 1:gdm (2018-6740c38cf4)
  • NASL familySuSE Local Security Checks
    NASL idSUSE_SU-2018-2527-1.NASL
    descriptionThis update for gdm fixes the following security issue : - CVE-2018-14424: The daemon in GDM did not properly unexport display objects from its D-Bus interface when they are destroyed, which allowed a local attacker to trigger a use-after-free via a specially crafted sequence of D-Bus method calls, resulting in a denial of service or potential code execution (bsc#1103737). Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id112146
    published2018-08-28
    reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/112146
    titleSUSE SLED12 / SLES12 Security Update : gdm (SUSE-SU-2018:2527-1)

References