Oracle Linux 5 : kernel (ELSA-2016-0045)

#%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-2016:0045 and 
# Oracle Linux Security Advisory ELSA-2016-0045 respectively.
#

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

if (description)
{
  script_id(88030);
  script_version("2.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/08/24");

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

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

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Oracle Linux host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"From Red Hat Security Advisory 2016:0045 :

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://oss.oracle.com/pipermail/el-errata/2016-January/005699.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://oss.oracle.com/pipermail/el-errata/2016-January/005700.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected kernel 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:oracle:linux:kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-PAE");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-PAE-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-debug-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-headers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-xen");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:kernel-xen-devel");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:5");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/21");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Oracle Linux Local Security Checks");

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

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/OracleLinux")) audit(AUDIT_OS_NOT, "Oracle Linux");
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:release)) audit(AUDIT_OS_NOT, "Oracle Linux");
os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Oracle Linux");
os_ver = os_ver[1];
if (! preg(pattern:"^5([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Oracle Linux 5", "Oracle Linux " + 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 && "ia64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Oracle Linux", cpu);

if (get_one_kb_item("Host/ksplice/kernel-cves"))
{
  cve_list = make_list("CVE-2015-5364", "CVE-2015-5366");  
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, "KSplice hotfix for ELSA-2016-0045");
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

kernel_major_minor = get_kb_item("Host/uname/major_minor");
if (empty_or_null(kernel_major_minor)) exit(1, "Unable to determine kernel major-minor level.");
expected_kernel_major_minor = "2.6";
if (kernel_major_minor != expected_kernel_major_minor)
  audit(AUDIT_OS_NOT, "running kernel level " + expected_kernel_major_minor + ", it is running kernel level " + kernel_major_minor);

flag = 0;
if (rpm_exists(release:"EL5", rpm:"kernel-2.6.18") && rpm_check(release:"EL5", reference:"kernel-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-PAE-2.6.18") && rpm_check(release:"EL5", cpu:"i386", reference:"kernel-PAE-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-PAE-devel-2.6.18") && rpm_check(release:"EL5", cpu:"i386", reference:"kernel-PAE-devel-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-debug-2.6.18") && rpm_check(release:"EL5", reference:"kernel-debug-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-debug-devel-2.6.18") && rpm_check(release:"EL5", reference:"kernel-debug-devel-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-devel-2.6.18") && rpm_check(release:"EL5", reference:"kernel-devel-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-doc-2.6.18") && rpm_check(release:"EL5", reference:"kernel-doc-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-headers-2.6.18") && rpm_check(release:"EL5", reference:"kernel-headers-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-xen-2.6.18") && rpm_check(release:"EL5", reference:"kernel-xen-2.6.18-408.el5")) flag++;
if (rpm_exists(release:"EL5", rpm:"kernel-xen-devel-2.6.18") && rpm_check(release:"EL5", reference:"kernel-xen-devel-2.6.18-408.el5")) 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, "affected kernel");
}