Amazon Linux AMI : cyrus-imapd (ALAS-2011-2)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux AMI Security Advisory ALAS-2011-2.
#

include("compat.inc");

if (description)
{
  script_id(78263);
  script_version("1.3");
  script_cvs_date("Date: 2018/04/18 15:09:34");

  script_cve_id("CVE-2011-3208");
  script_xref(name:"ALAS", value:"2011-2");
  script_xref(name:"RHSA", value:"2011:1317");

  script_name(english:"Amazon Linux AMI : cyrus-imapd (ALAS-2011-2)");
  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:
"The cyrus-imapd packages contain a high-performance mail server with
IMAP, POP3, NNTP, and Sieve support.

A buffer overflow flaw was found in the cyrus-imapd NNTP server,
nntpd. A remote user able to use the nntpd service could use this flaw
to crash the nntpd child process or, possibly, execute arbitrary code
with the privileges of the cyrus user. (CVE-2011-3208)

Users of cyrus-imapd are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. After
installing the update, cyrus-imapd will be restarted automatically."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://alas.aws.amazon.com/ALAS-2011-2.html"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Run 'yum update cyrus-imapd' to update your system."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:cyrus-imapd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:cyrus-imapd-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:cyrus-imapd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:cyrus-imapd-utils");
  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:"2014/10/12");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2018 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);

release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "A")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux AMI", "Amazon Linux " + os_ver);
}

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


flag = 0;
if (rpm_check(release:"ALA", reference:"cyrus-imapd-2.3.16-6.4.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"cyrus-imapd-debuginfo-2.3.16-6.4.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"cyrus-imapd-devel-2.3.16-6.4.amzn1")) flag++;
if (rpm_check(release:"ALA", reference:"cyrus-imapd-utils-2.3.16-6.4.amzn1")) 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, "cyrus-imapd / cyrus-imapd-debuginfo / cyrus-imapd-devel / etc");
}