SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1671-1) (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-2019:1671-1.
# The text itself is copyright (C) SUSE.
#

include('compat.inc');

if (description)
{
  script_id(126171);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id(
    "CVE-2019-11477",
    "CVE-2019-11478",
    "CVE-2019-11487",
    "CVE-2019-3846"
  );
  script_xref(name:"CEA-ID", value:"CEA-2019-0456");

  script_name(english:"SUSE SLES12 Security Update : kernel (SUSE-SU-2019:1671-1) (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:
"This update for the Linux Kernel 4.4.121-92_104 fixes several issues.

The following security issues were fixed :

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 (bsc#1136446).

CVE-2019-11477: A sequence of SACKs may have been crafted by a remote
attacker such that one can trigger an integer overflow, leading to a
kernel panic. (bsc#1137586).

CVE-2019-11478: It was possible to send a crafted sequence of SACKs
which would fragment the TCP retransmission queue. A remote attacker
may have been able to further exploit the fragmented queue to cause an
expensive linked-list walk for subsequent SACKs received for that same
TCP connection. (bsc#1137586)

CVE-2019-11487: The Linux kernel allowed page->_refcount reference
count overflow, with resultant use-after-free issues, if about 140 GiB
of RAM exists. This is related to fs/fuse/dev.c, fs/pipe.c,
fs/splice.c, include/linux/mm.h, include/linux/pipe_fs_i.h,
kernel/trace/trace.c, mm/gup.c, and mm/hugetlb.c. It can occur with
FUSE requests (bsc#1133191).

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=1133191");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1136446");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1136935");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1137597");
  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-2019-11478/");
  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-2019-3846/");
  # https://www.suse.com/support/update/announcement/2019/suse-su-20191671-1/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?7a9ba5d4");
  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 for SAP 12-SP2:zypper in -t patch
SUSE-SLE-SAP-12-SP2-2019-1653=1 SUSE-SLE-SAP-12-SP2-2019-1654=1
SUSE-SLE-SAP-12-SP2-2019-1656=1 SUSE-SLE-SAP-12-SP2-2019-1669=1
SUSE-SLE-SAP-12-SP2-2019-1670=1 SUSE-SLE-SAP-12-SP2-2019-1671=1
SUSE-SLE-SAP-12-SP2-2019-1672=1

SUSE Linux Enterprise Server 12-SP2-LTSS:zypper in -t patch
SUSE-SLE-SERVER-12-SP2-2019-1653=1 SUSE-SLE-SERVER-12-SP2-2019-1654=1
SUSE-SLE-SERVER-12-SP2-2019-1656=1 SUSE-SLE-SERVER-12-SP2-2019-1669=1
SUSE-SLE-SERVER-12-SP2-2019-1670=1 SUSE-SLE-SERVER-12-SP2-2019-1671=1
SUSE-SLE-SERVER-12-SP2-2019-1672=1

SUSE Linux Enterprise Live Patching 12-SP4:zypper in -t patch
SUSE-SLE-Live-Patching-12-SP4-2019-1649=1
SUSE-SLE-Live-Patching-12-SP4-2019-1675=1

SUSE Linux Enterprise Live Patching 12-SP3:zypper in -t patch
SUSE-SLE-Live-Patching-12-SP3-2019-1655=1
SUSE-SLE-Live-Patching-12-SP3-2019-1657=1
SUSE-SLE-Live-Patching-12-SP3-2019-1658=1
SUSE-SLE-Live-Patching-12-SP3-2019-1659=1
SUSE-SLE-Live-Patching-12-SP3-2019-1660=1
SUSE-SLE-Live-Patching-12-SP3-2019-1661=1
SUSE-SLE-Live-Patching-12-SP3-2019-1662=1
SUSE-SLE-Live-Patching-12-SP3-2019-1663=1
SUSE-SLE-Live-Patching-12-SP3-2019-1673=1
SUSE-SLE-Live-Patching-12-SP3-2019-1676=1
SUSE-SLE-Live-Patching-12-SP3-2019-1677=1
SUSE-SLE-Live-Patching-12-SP3-2019-1678=1");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"in_the_news", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/06/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_101-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_104-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_109-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_85-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_92-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_95-default");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:kgraft-patch-4_4_121-92_98-default");
  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:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLES12 SP2", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_121-92_101-default-3-2.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_121-92_104-default-3-2.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_121-92_109-default-3-2.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_121-92_85-default-9-2.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_121-92_92-default-7-2.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_121-92_95-default-6-2.1")) flag++;
if (rpm_check(release:"SLES12", sp:"2", cpu:"x86_64", reference:"kgraft-patch-4_4_121-92_98-default-5-2.1")) 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");
}