RHEL 5 : kernel (RHSA-2016:0045)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2016:0045. The text 
# itself is copyright (C) Red Hat, Inc.
#

include("compat.inc");

if (description)
{
  script_id(87998);
  script_version("2.8");
  script_cvs_date("Date: 2019/10/24 15:35:40");

  script_cve_id("CVE-2015-5364", "CVE-2015-5366");
  script_xref(name:"RHSA", value:"2016:0045");

  script_name(english:"RHEL 5 : kernel (RHSA-2016:0045)");
  script_summary(english:"Checks the rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Red Hat host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Updated kernel packages that fix two security issues are now available
for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Important
security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.

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

* Two flaws were found in the way the Linux kernel's networking
implementation handled UDP packets with incorrect checksum values. A
remote attacker could potentially use these flaws to trigger an
infinite loop in the kernel, resulting in a denial of service on the
system, or cause a denial of service in applications using the edge
triggered epoll functionality. (CVE-2015-5364, CVE-2015-5366,
Important)

All kernel users are advised to upgrade to these updated packages,
which contain backported patches to correct these issues. The system
must be rebooted for this update to take effect."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/errata/RHSA-2016:0045"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2015-5364"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://access.redhat.com/security/cve/cve-2015-5366"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  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:redhat:enterprise_linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-PAE");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-PAE-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-PAE-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-debuginfo-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-kdump-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-xen-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:kernel-xen-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:5");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/20");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Red Hat Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/cpu");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Red Hat" >!< release) audit(AUDIT_OS_NOT, "Red Hat");
os_ver = eregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Red Hat");
os_ver = os_ver[1];
if (! ereg(pattern:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Red Hat 5.x", "Red Hat " + os_ver);

if (!get_kb_item("Host/RedHat/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$" && "s390" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Red Hat", cpu);

yum_updateinfo = get_kb_item("Host/RedHat/yum-updateinfo");
if (!empty_or_null(yum_updateinfo)) 
{
  rhsa = "RHSA-2016:0045";
  yum_report = redhat_generate_yum_updateinfo_report(rhsa:rhsa);
  if (!empty_or_null(yum_report))
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : yum_report 
    );
    exit(0);
  }
  else
  {
    audit_message = "affected by Red Hat security advisory " + rhsa;
    audit(AUDIT_OS_NOT, audit_message);
  }
}
else
{
  flag = 0;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-PAE-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-PAE-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-PAE-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-debug-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-debug-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-debug-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-debug-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-debug-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-debug-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-debug-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-debug-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-debug-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-debuginfo-common-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-debuginfo-common-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-debuginfo-common-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", reference:"kernel-doc-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i386", reference:"kernel-headers-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-headers-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-headers-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-kdump-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-kdump-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"s390x", reference:"kernel-kdump-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-xen-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-xen-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-xen-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-xen-debuginfo-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"i686", reference:"kernel-xen-devel-2.6.18-408.el5")) flag++;
  if (rpm_check(release:"RHEL5", cpu:"x86_64", reference:"kernel-xen-devel-2.6.18-408.el5")) flag++;

  if (flag)
  {
    security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get() + redhat_report_package_caveat()
    );
    exit(0);
  }
  else
  {
    tested = pkg_tests_get();
    if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
    else audit(AUDIT_PACKAGE_NOT_INSTALLED, "kernel / kernel-PAE / kernel-PAE-debuginfo / kernel-PAE-devel / etc");
  }
}