SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:0196-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:0196-1.
# The text itself is copyright (C) SUSE.
#

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if (description)
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  script_id(121466);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/24");

  script_cve_id(
    "CVE-2013-2547",
    "CVE-2018-9568",
    "CVE-2018-12232",
    "CVE-2018-14625",
    "CVE-2018-16862",
    "CVE-2018-16884",
    "CVE-2018-18397",
    "CVE-2018-19407",
    "CVE-2018-19854",
    "CVE-2018-19985",
    "CVE-2018-20169"
  );
  script_bugtraq_id(58382);

  script_name(english:"SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2019:0196-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various
security and bugfixes.

The following security bugs were fixed :

CVE-2018-9568: In sk_clone_lock of sock.c, there is a possible memory
corruption due to type confusion. This could lead to local escalation
of privilege with no additional execution privileges needed. User
interaction is not needed for exploitation. (bnc#1118319).

CVE-2018-12232: In net/socket.c in the there is a race condition
between fchownat and close in cases where they target the same socket
file descriptor, related to the sock_close and sockfs_setattr
functions. fchownat did not increment the file descriptor reference
count, which allowed close to set the socket to NULL during fchownat's
execution, leading to a NULL pointer dereference and system crash
(bnc#1097593).

CVE-2018-14625: A flaw was found where an attacker may be able to have
an uncontrolled read to kernel-memory from within a vm guest. A race
condition between connect() and close() function may allow an attacker
using the AF_VSOCK protocol to gather a 4 byte information leak or
possibly intercept or corrupt AF_VSOCK messages destined to other
clients (bnc#1106615).

CVE-2018-16862: A security flaw was found in a way that the cleancache
subsystem clears an inode after the final file truncation (removal).
The new file created with the same inode may contain leftover pages
from cleancache and the old file data instead of the new one
(bnc#1117186).

CVE-2018-16884: NFS41+ shares mounted in different network namespaces
at the same time can make bc_svc_process() use wrong back-channel IDs
and cause a use-after-free vulnerability. Thus a malicious container
user can cause a host kernel memory corruption and a system panic. Due
to the nature of the flaw, privilege escalation cannot be fully ruled
out (bnc#1119946).

CVE-2018-18397: The userfaultfd implementation mishandled access
control for certain UFFDIO_ ioctl calls, as demonstrated by allowing
local users to write data into holes in a tmpfs file (if the user has
read-only access to that file, and that file contains holes), related
to fs/userfaultfd.c and mm/userfaultfd.c (bnc#1117656).

CVE-2018-19407: The vcpu_scan_ioapic function in arch/x86/kvm/x86.c
allowed local users to cause a denial of service (NULL pointer
dereference and BUG) via crafted system calls that reach a situation
where ioapic is uninitialized (bnc#1116841).

CVE-2018-19854: An issue was discovered in the crypto_report_one() and
related functions in crypto/crypto_user.c (the crypto user
configuration API) do not fully initialize structures that are copied
to userspace, potentially leaking sensitive memory to user programs.
NOTE: this is a CVE-2013-2547 regression but with easier
exploitability because the attacker did not need a capability
(however, the system must have the CONFIG_CRYPTO_USER kconfig option)
(bnc#1118428).

CVE-2018-19985: The function hso_probe read if_num from the USB device
(as an u8) and used it without a length check to index an array,
resulting in an OOB memory read in hso_probe or hso_get_config_data
that could be used by local attackers (bnc#1120743).

CVE-2018-20169: The USB subsystem mishandled size checks during the
reading of an extra descriptor, related to __usb_get_extra_descriptor
in drivers/usb/core/usb.c (bnc#1119714).

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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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1116040");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1116336");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1116803");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1116841");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120633");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120743");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1120954");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121017");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121058");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121263");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121273");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121477");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121483");
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  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121715");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1121973");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-12232/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-14625/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-16862/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-16884/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-18397/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-19407/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-19854/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-19985/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-20169/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-9568/");
  # https://www.suse.com/support/update/announcement/2019/suse-su-20190196-1/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b7b6ad1b");
  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 Workstation Extension 12-SP4:zypper in -t patch
SUSE-SLE-WE-12-SP4-2019-196=1

SUSE Linux Enterprise Software Development Kit 12-SP4:zypper in -t
patch SUSE-SLE-SDK-12-SP4-2019-196=1

SUSE Linux Enterprise Server 12-SP4:zypper in -t patch
SUSE-SLE-SERVER-12-SP4-2019-196=1

SUSE Linux Enterprise Live Patching 12-SP4:zypper in -t patch
SUSE-SLE-Live-Patching-12-SP4-2019-196=1

SUSE Linux Enterprise High Availability 12-SP4:zypper in -t patch
SUSE-SLE-HA-12-SP4-2019-196=1

SUSE Linux Enterprise Desktop 12-SP4:zypper in -t patch
SUSE-SLE-DESKTOP-12-SP4-2019-196=1");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-9568");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2018-16884");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2013/03/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/01/29");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/30");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-base-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-devel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-extra-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-default-man");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-syms");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  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:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP4", os_ver + " SP" + sp);
if (os_ver == "SLED12" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLED12 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-default-devel-debuginfo-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", cpu:"s390x", reference:"kernel-default-man-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"kernel-default-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"kernel-default-base-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"kernel-default-base-debuginfo-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"kernel-default-debuginfo-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"kernel-default-debugsource-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"kernel-default-devel-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLES12", sp:"4", reference:"kernel-syms-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-default-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-default-debuginfo-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-default-debugsource-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-default-devel-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-default-devel-debuginfo-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-default-extra-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-default-extra-debuginfo-4.12.14-95.6.1")) flag++;
if (rpm_check(release:"SLED12", sp:"4", cpu:"x86_64", reference:"kernel-syms-4.12.14-95.6.1")) 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");
}