Amazon Linux AMI : openswan (ALAS-2011-06)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2011-06.
#

include("compat.inc");

if (description)
{
  script_id(69565);
  script_version("$Revision: 1.4 $");
  script_cvs_date("$Date: 2015/01/30 14:43:52 $");

  script_cve_id("CVE-2011-3380");
  script_xref(name:"ALAS", value:"2011-06");
  script_xref(name:"RHSA", value:"2011:1356");

  script_name(english:"Amazon Linux AMI : openswan (ALAS-2011-06)");
  script_summary(english:"Checks rpm output for the updated packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Amazon Linux AMI host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"When an ISAKMP message with an invalid KEY_LENGTH attribute is
received, the error handling function crashes on a NULL pointer
dereference. Openswan automatically restarts the pluto IKE daemon but
all ISAKMP state is lost. This vulnerability does NOT allow an
attacker access to the system. This can be used to launch a denial of
service attack by sending repeated IKE packets with the invalid key
length attribute."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.openswan.org/download/CVE-2011-3380/CVE-2011-3380.txt"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2011-6.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum upgrade openswan' to upgrade your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openswan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openswan-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:openswan-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2011/10/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/09/04");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2015 Tenable Network Security, Inc.");
  script_family(english:"Amazon Linux Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/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);
if (!get_kb_item("Host/AmazonLinux/release")) audit(AUDIT_OS_NOT, "Amazon Linux AMI");
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (rpm_check(release:"ALA", reference:"openswan-2.6.36-1.12.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"openswan-debuginfo-2.6.36-1.12.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"openswan-doc-2.6.36-1.12.amzn1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openswan / openswan-debuginfo / openswan-doc");
}