CentOS 7 : kernel (CESA-2017:3315)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2017:3315 and 
# CentOS Errata and Security Advisory 2017:3315 respectively.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(105056);
  script_version("3.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");

  script_cve_id("CVE-2017-1000380");
  script_xref(name:"RHSA", value:"2017:3315");

  script_name(english:"CentOS 7 : kernel (CESA-2017:3315)");
  script_summary(english:"Checks rpm output for the updated packages");

  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 7.

Red Hat Product Security has rated this update as having a security
impact of Moderate. 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.

These updated kernel packages include several security issues and
numerous bug fixes, some of which you can see below. Space precludes
documenting all of these bug fixes in this advisory. To see the
complete list of bug fixes, users are directed to the related
Knowledge Article: https://access.redhat.com/ articles/3253081

Security Fix(es) :

* It was found that the timer functionality in the Linux kernel ALSA
subsystem is prone to a race condition between read and ioctl system
call handlers, resulting in an uninitialized memory disclosure to user
space. A local user could use this flaw to read information belonging
to other users. (CVE-2017-1000380, Moderate)

Red Hat would like to thank Alexander Potapenko (Google) for reporting
this issue."
  );
  # https://lists.centos.org/pipermail/centos-announce/2017-December/022682.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0533a974"
  );
  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:U/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-2017-1000380");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  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-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-tools-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:kernel-tools-libs-devel");
  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:7");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/06/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"CentOS Local Security Checks");

  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:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.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-7", cpu:"x86_64", reference:"kernel-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-abi-whitelists-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-debug-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-debug-devel-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-devel-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-doc-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-headers-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-tools-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-tools-libs-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"kernel-tools-libs-devel-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"perf-3.10.0-693.11.1.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"python-perf-3.10.0-693.11.1.el7")) 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");
}