SUSE SLED12 / SLES12 Security Update : gdm (SUSE-SU-2018:2527-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:2527-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(112146);
  script_version("1.4");
  script_cvs_date("Date: 2019/09/10 13:51:48");

  script_cve_id("CVE-2018-14424");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : gdm (SUSE-SU-2018:2527-1)");
  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 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."
  );
  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-20182527-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?188d2dd5"
  );
  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 Software Development Kit 12-SP3:zypper in -t
patch SUSE-SLE-SDK-12-SP3-2018-1765=1

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2018-1765=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP3-2018-1765=1"
  );
  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: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: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:12");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/08/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/08/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/28");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 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:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP3", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(3)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP3", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"3", reference:"gdm-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"gdm-debuginfo-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"gdm-debugsource-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"libgdm1-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"libgdm1-debuginfo-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"typelib-1_0-Gdm-1_0-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"gdm-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"gdm-debuginfo-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"gdm-debugsource-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"libgdm1-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"libgdm1-debuginfo-3.10.0.1-54.6.3")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"typelib-1_0-Gdm-1_0-3.10.0.1-54.6.3")) 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");
}