SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2018:3689-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2018:3689-1.
# The text itself is copyright (C) SUSE.
#

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  script_cve_id("CVE-2018-10940", "CVE-2018-14633", "CVE-2018-16658", "CVE-2018-18281", "CVE-2018-18386", "CVE-2018-18690", "CVE-2018-18710", "CVE-2018-9516");

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"The SUSE Linux Enterprise 12 SP3 kernel was updated to 4.4.162 to
receive various security and bugfixes.

The following security bugs were fixed :

CVE-2018-14633: A security flaw was found in the
chap_server_compute_md5() function in the ISCSI target code in a way
an authentication request from an ISCSI initiator is processed. An
unauthenticated remote attacker can cause a stack-based buffer
overflow and smash up to 17 bytes of the stack. The attack requires
the iSCSI target to be enabled on the victim host. Depending on how
the target's code was built (i.e. depending on a compiler, compile
flags and hardware architecture) an attack may lead to a system crash
and thus to a denial-of-service or possibly to a non-authorized access
to data exported by an iSCSI target. Due to the nature of the flaw,
privilege escalation cannot be fully ruled out, although we believe it
is highly unlikely. (bnc#1107829).

CVE-2018-18281: The mremap() syscall performs TLB flushes after
dropping pagetable locks. If a syscall such as ftruncate() removes
entries from the pagetables of a task that is in the middle of
mremap(), a stale TLB entry can remain for a short time that permits
access to a physical page after it has been released back to the page
allocator and reused. (bnc#1113769).

CVE-2018-18386: drivers/tty/n_tty.c allowed local attackers (who are
able to access pseudo terminals) to hang/block further usage of any
pseudo terminal devices due to an EXTPROC versus ICANON confusion in
TIOCINQ (bnc#1094825).

CVE-2018-18690: A local attacker able to set attributes on an xfs
filesystem could make this filesystem non-operational until the next
mount by triggering an unchecked error condition during an xfs
attribute change, because xfs_attr_shortform_addname in
fs/xfs/libxfs/xfs_attr.c mishandled ATTR_REPLACE operations with
conversion of an attr from short to long form (bnc#1105025).

CVE-2018-18710: An issue was discovered in the Linux kernel An
information leak in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c
could be used by local attackers to read kernel memory because a cast
from unsigned long to int interferes with bounds checking. This is
similar to CVE-2018-10940 and CVE-2018-16658 (bnc#1113751).

CVE-2018-9516: A lack of certain checks in the hid_debug_events_read()
function in the drivers/hid/hid-debug.c file might have resulted in
receiving userspace buffer overflow and an out-of-bounds write or to
the infinite loop. (bnc#1108498).

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."
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"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 Workstation Extension 12-SP3:zypper in -t patch
SUSE-SLE-WE-12-SP3-2018-2621=1

SUSE Linux Enterprise Software Development Kit 12-SP3:zypper in -t
patch SUSE-SLE-SDK-12-SP3-2018-2621=1

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch
SUSE-SLE-SERVER-12-SP3-2018-2621=1

SUSE Linux Enterprise High Availability 12-SP3:zypper in -t patch
SUSE-SLE-HA-12-SP3-2018-2621=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP3-2018-2621=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."
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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", cpu:"x86_64", reference:"lttng-modules-2.7.1-8.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"lttng-modules-debugsource-2.7.1-8.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"lttng-modules-kmp-default-2.7.1_k4.4.162_94.69-8.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"x86_64", reference:"lttng-modules-kmp-default-debuginfo-2.7.1_k4.4.162_94.69-8.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"3", cpu:"s390x", reference:"kernel-default-man-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"kernel-default-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"kernel-default-base-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"kernel-default-base-debuginfo-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"kernel-default-debuginfo-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"kernel-default-debugsource-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"kernel-default-devel-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLES12", sp:"3", reference:"kernel-syms-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"kernel-default-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"kernel-default-debuginfo-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"kernel-default-debugsource-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"kernel-default-devel-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"kernel-default-extra-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"kernel-default-extra-debuginfo-4.4.162-94.69.2")) flag++;
if (rpm_check(release:"SLED12", sp:"3", cpu:"x86_64", reference:"kernel-syms-4.4.162-94.69.2")) 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, "kernel");
}