CentOS 6 : kernel (CESA-2019:3836)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2019:3836 and 
# CentOS Errata and Security Advisory 2019:3836 respectively.
#

include('compat.inc');

if (description)
{
  script_id(130978);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id(
    "CVE-2018-12207",
    "CVE-2019-0154",
    "CVE-2019-11135",
    "CVE-2019-3900"
  );
  script_xref(name:"RHSA", value:"2019:3836");
  script_xref(name:"CEA-ID", value:"CEA-2021-0025");

  script_name(english:"CentOS 6 : kernel (CESA-2019:3836)");

  script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"An update for kernel is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security
impact of Important. A Common Vulnerability Scoring System (CVSS) base
score, which gives a detailed severity rating, is available for each
vulnerability from the CVE link(s) in the References section.

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

Security Fix(es) :

* hw: Machine Check Error on Page Size Change (IFU) (CVE-2018-12207)

* hw: TSX Transaction Asynchronous Abort (TAA) (CVE-2019-11135)

* Kernel: vhost_net: infinite loop while receiving packets leads to
DoS (CVE-2019-3900)

* hw: Intel GPU Denial Of Service while accessing MMIO in lower power
state (CVE-2019-0154)

For more details about the security issue(s), including the impact, a
CVSS score, acknowledgments, and other related information, refer to
the CVE page(s) listed in the References section.

Bug Fix(es) :

* [Intel 6.10 Bug] With mWait/C-states disabled, HT on, ibrs enabled,
performance impact observed on user space benchmark (BZ#1560787)

* kernel-2.6.32-573.60.2.el6 hangs/resets during boot in
efi_enter_virtual_mode() on Xeon v2 E7-2870 (BZ#1645724)

* Slab leak: skbuff_head_cache slab object still allocated after mcast
processes are stopped and 'fragments dropped after timeout' errors are
shown (BZ#1752536)");
  # https://lists.centos.org/pipermail/centos-announce/2019-November/023512.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?327555f5");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-11135");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/04/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/11/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-abi-whitelists");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-firmware");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:perf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:python-perf");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CentOS 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/CentOS/release", "Host/CentOS/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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^6([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 6.x", "CentOS " + os_ver);

if (!get_kb_item("Host/CentOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);


flag = 0;
if (rpm_check(release:"CentOS-6", reference:"kernel-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-abi-whitelists-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-debug-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-debug-devel-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-devel-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-doc-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-firmware-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"kernel-headers-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"perf-2.6.32-754.24.2.el6")) flag++;
if (rpm_check(release:"CentOS-6", reference:"python-perf-2.6.32-754.24.2.el6")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel / kernel-abi-whitelists / kernel-debug / kernel-debug-devel / etc");
}