SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:2401-1) (Foreshadow)

2018-08-20T00:00:00
ID SUSE_SU-2018-2401-1.NASL
Type nessus
Reporter This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2020-05-02T00:00:00

Description

This update for xen fixes the following security issues :

  • CVE-2018-3646: Systems with microprocessors utilizing speculative execution and address translations may have allowed unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis (bsc#1091107, bsc#1027519).

  • Incorrect MSR_DEBUGCTL handling let guests enable BTS allowing a malicious or buggy guest administrator can lock up the entire host (bsc#1103276)

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:2401-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(112010);
  script_version("1.4");
  script_cvs_date("Date: 2019/09/10 13:51:48");

  script_cve_id("CVE-2018-3646");

  script_name(english:"SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2018:2401-1) (Foreshadow)");
  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 xen fixes the following security issues :

  - CVE-2018-3646: Systems with microprocessors utilizing
    speculative execution and address translations may have
    allowed unauthorized disclosure of information residing
    in the L1 data cache to an attacker with local user
    access with guest OS privilege via a terminal page fault
    and a side-channel analysis (bsc#1091107, bsc#1027519).

  - Incorrect MSR_DEBUGCTL handling let guests enable BTS
    allowing a malicious or buggy guest administrator can
    lock up the entire host (bsc#1103276)

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=1027519"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1091107"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1103276"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2018-3646/"
  );
  # https://www.suse.com/support/update/announcement/2018/suse-su-20182401-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?88acf5f3"
  );
  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-SP3-2018-1656=1

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2018-1656=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP3-2018-1656=1

SUSE CaaS Platform ALL :

To install this update, use the SUSE CaaS Platform Velum dashboard. It
will inform you if it detects new updates and let you then trigger
updating of the complete cluster in a controlled way.

SUSE CaaS Platform 3.0 :

To install this update, use the SUSE CaaS Platform Velum dashboard. It
will inform you if it detects new updates and let you then trigger
updating of the complete cluster in a controlled way."
  );
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:N/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-doc-html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-libs-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:xen-tools-domU-debuginfo");
  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:"2018/08/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/08/20");
  script_set_attribute(attribute:"in_the_news", value:"true");
  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);
if (cpu >!< "x86_64") audit(AUDIT_ARCH_NOT, "x86_64", 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", cpu:"x86_64", reference:"xen-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-debugsource-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-doc-html-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-libs-32bit-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-libs-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-libs-debuginfo-32bit-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-libs-debuginfo-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-tools-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-tools-debuginfo-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-tools-domU-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"xen-tools-domU-debuginfo-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xen-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xen-debugsource-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xen-libs-32bit-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xen-libs-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xen-libs-debuginfo-32bit-4.9.2_10-3.41.1")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"xen-libs-debuginfo-4.9.2_10-3.41.1")) 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, "xen");
}