Ubuntu 8.04 LTS / 8.10 / 9.04 : dnsmasq vulnerabilities (USN-827-1)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-827-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

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

if (description)
{
  script_id(40848);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2009-2957", "CVE-2009-2958");
  script_bugtraq_id(36120);
  script_xref(name:"USN", value:"827-1");

  script_name(english:"Ubuntu 8.04 LTS / 8.10 / 9.04 : dnsmasq vulnerabilities (USN-827-1)");
  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:
"IvAin Arce, Pablo HernAin Jorge, Alejandro Pablo Rodriguez, MartAn
Coco, Alberto SoliAto Testa and Pablo Annetta discovered that Dnsmasq
did not properly validate its input when processing TFTP requests for
files with long names. A remote attacker could cause a denial of
service or execute arbitrary code with user privileges. Dnsmasq runs
as the 'dnsmasq' user by default on Ubuntu. (CVE-2009-2957)

Steve Grubb discovered that Dnsmasq could be made to dereference a
NULL pointer when processing certain TFTP requests. A remote attacker
could cause a denial of service by sending a crafted TFTP request.
(CVE-2009-2958).

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/827-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected dnsmasq and / or dnsmasq-base packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(119, 399);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dnsmasq");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dnsmasq-base");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:9.04");

  script_set_attribute(attribute:"patch_publication_date", value:"2009/09/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/09/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2009-2019 Canonical, Inc. / NASL script (C) 2009-2018 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 (! ereg(pattern:"^(8\.04|8\.10|9\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 8.04 / 8.10 / 9.04", "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:"8.04", pkgname:"dnsmasq", pkgver:"2.41-2ubuntu2.2")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"dnsmasq-base", pkgver:"2.41-2ubuntu2.2")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"dnsmasq", pkgver:"2.45-1ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.10", pkgname:"dnsmasq-base", pkgver:"2.45-1ubuntu1.1")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"dnsmasq", pkgver:"2.47-3ubuntu0.1")) flag++;
if (ubuntu_check(osver:"9.04", pkgname:"dnsmasq-base", pkgver:"2.47-3ubuntu0.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "dnsmasq / dnsmasq-base");
}