SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1536-1) (SACK Panic) (SACK Slowness)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2019:1536-1.
# The text itself is copyright (C) SUSE.
#

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  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id(
    "CVE-2018-7191",
    "CVE-2019-3846",
    "CVE-2019-5489",
    "CVE-2019-10124",
    "CVE-2019-11085",
    "CVE-2019-11477",
    "CVE-2019-11479",
    "CVE-2019-11486",
    "CVE-2019-11487",
    "CVE-2019-11815",
    "CVE-2019-11833",
    "CVE-2019-11884",
    "CVE-2019-12382"
  );
  script_xref(name:"CEA-ID", value:"CEA-2019-0456");

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1536-1) (SACK Panic) (SACK Slowness)");

  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 4.12.14 to
receive various security and bugfixes.

The following security bugs were fixed :

CVE-2019-11477: A sequence of SACKs may have been crafted such that
one can trigger an integer overflow, leading to a kernel panic.

CVE-2019-11479: An attacker could force the Linux kernel to segment
its responses into multiple TCP segments. This would drastically
increased the bandwidth required to deliver the same amount of data.
Further, it would consume additional resources such as CPU and NIC
processing power.

CVE-2019-3846: A flaw that allowed an attacker to corrupt memory and
possibly escalate privileges was found in the mwifiex kernel module
while connecting to a malicious wireless network. (bnc#1136424)

CVE-2019-12382: An issue was discovered in drm_load_edid_firmware in
drivers/gpu/drm/drm_edid_load.c in the Linux kernel There was an
unchecked kstrdup of fwstr, which might have allowed an attacker to
cause a denial of service (NULL pointer dereference and system crash).
(bnc#1136586)

CVE-2019-11487: The Linux kernel allowed page reference count
overflow, with resultant use-after-free issues, if about 140 GiB of
RAM existed. It could have occured with FUSE requests. (bnc#1133190)

CVE-2019-5489: The mincore() implementation in mm/mincore.c in the
Linux kernel allowed local attackers to observe page cache access
patterns of other processes on the same system, potentially allowing
sniffing of secret information. (Fixing this affects the output of the
fincore program.) Limited remote exploitation may have been possible,
as demonstrated by latency differences in accessing public files from
an Apache HTTP Server. (bnc#1120843)

CVE-2019-11833: fs/ext4/extents.c in the Linux kernel did not zero out
the unused memory region in the extent tree block, which might have
allowed local users to obtain sensitive information by reading
uninitialized data in the filesystem. (bnc#1135281)

CVE-2018-7191: In the tun subsystem in the Linux kernel,
dev_get_valid_name was not called before register_netdevice. This
allowed local users to cause a denial of service (NULL pointer
dereference and panic) via an ioctl(TUNSETIFF) call with a dev name
containing a / character. (bnc#1135603)

CVE-2019-11085: Insufficient input validation in Kernel Mode Driver in
i915 Graphics for Linux may have allowed an authenticated user to
potentially enable escalation of privilege via local access.
(bnc#1135278)

CVE-2019-11815: An issue was discovered in rds_tcp_kill_sock in
net/rds/tcp.c in the Linux kernel There was a race condition leading
to a use-after-free, related to net namespace cleanup. (bnc#1134537)

CVE-2019-11884: The do_hidp_sock_ioctl function in
net/bluetooth/hidp/sock.c in the Linux kernel allowed a local user to
obtain potentially sensitive information from kernel stack memory via
a hidPCONNADD command, because a name field may not end with a '\0'
character. (bnc#1134848)

CVE-2019-11486: The Siemens R3964 line discipline driver in
drivers/tty/n_r3964.c in the Linux kernel had multiple race
conditions. (bnc#1133188)

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=1137752");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-7191/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-10124/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11085/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11477/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11479/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11486/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11487/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11815/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11833/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-11884/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-12382/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-3846/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-5489/");
  # https://www.suse.com/support/update/announcement/2019/suse-su-20191536-1/
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  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 Server 12-SP4:zypper in -t patch
SUSE-SLE-SERVER-12-SP4-2019-1536=1");
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  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
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  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-11815");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2019-3846");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
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  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/17");
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  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-base-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-azure-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kernel-syms-azure");
  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:"^(SLES12)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE 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:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-azure-4.12.14-6.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-azure-base-4.12.14-6.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-azure-base-debuginfo-4.12.14-6.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-azure-debuginfo-4.12.14-6.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-azure-debugsource-4.12.14-6.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-azure-devel-4.12.14-6.15.2")) flag++;
if (rpm_check(release:"SLES12", sp:"4", cpu:"x86_64", reference:"kernel-syms-azure-4.12.14-6.15.2")) 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");
}