Ubuntu 10.04 LTS / 10.10 / 11.04 : exim4 vulnerability (USN-1130-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-1130-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(55091);
  script_version("1.11");
  script_cvs_date("Date: 2019/09/19 12:54:27");

  script_cve_id("CVE-2011-1764");
  script_bugtraq_id(47736);
  script_xref(name:"USN", value:"1130-1");

  script_name(english:"Ubuntu 10.04 LTS / 10.10 / 11.04 : exim4 vulnerability (USN-1130-1)");
  script_summary(english:"Checks dpkg output for updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Ubuntu host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"It was discovered that the Exim daemon did not correctly handle format
strings in DKIM headers. An unauthenticated remote attacker could send
specially crafted email to run arbitrary code as the Exim user. The
default compiler options for affected releases reduces the
vulnerability to a denial of service under most conditions.

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/1130-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Update the affected exim4-daemon-custom, exim4-daemon-heavy and / or
exim4-daemon-light packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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:canonical:ubuntu_linux:exim4-daemon-custom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:exim4-daemon-heavy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:exim4-daemon-light");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:10.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:11.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/10/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/05/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/06/13");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2011-2019 Canonical, Inc. / NASL script (C) 2011-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(10\.04|10\.10|11\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 10.04 / 10.10 / 11.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) 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, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"10.04", pkgname:"exim4-daemon-custom", pkgver:"4.71-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"exim4-daemon-heavy", pkgver:"4.71-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.04", pkgname:"exim4-daemon-light", pkgver:"4.71-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"exim4-daemon-custom", pkgver:"4.72-1ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"exim4-daemon-heavy", pkgver:"4.72-1ubuntu1.2")) flag++;
if (ubuntu_check(osver:"10.10", pkgname:"exim4-daemon-light", pkgver:"4.72-1ubuntu1.2")) flag++;
if (ubuntu_check(osver:"11.04", pkgname:"exim4-daemon-custom", pkgver:"4.74-1ubuntu1.1")) flag++;
if (ubuntu_check(osver:"11.04", pkgname:"exim4-daemon-heavy", pkgver:"4.74-1ubuntu1.1")) flag++;
if (ubuntu_check(osver:"11.04", pkgname:"exim4-daemon-light", pkgver:"4.74-1ubuntu1.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "exim4-daemon-custom / exim4-daemon-heavy / exim4-daemon-light");
}