Ubuntu 6.06 LTS / 6.10 / 7.04 / 7.10 : dhcp vulnerability (USN-531-1)

#%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-531-1. 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(28136);
  script_version("1.18");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2007-5365", "CVE-2008-5010");
  script_xref(name:"USN", value:"531-1");

  script_name(english:"Ubuntu 6.06 LTS / 6.10 / 7.04 / 7.10 : dhcp vulnerability (USN-531-1)");
  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:
"Nahuel Riva and Gerardo Richarte discovered that the DHCP server did
not correctly handle certain client options. A remote attacker could
send malicious DHCP replies to the server and execute arbitrary code.

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/531-1/"
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected dhcp, dhcp-client and / or dhcp-relay packages."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploit_framework_core", value:"true");
  script_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dhcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dhcp-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dhcp-relay");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:6.06:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:6.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:7.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:7.10");

  script_set_attribute(attribute:"patch_publication_date", value:"2007/10/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2007/11/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2007-2019 Canonical, Inc. / NASL script (C) 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:"^(6\.06|6\.10|7\.04|7\.10)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 6.06 / 6.10 / 7.04 / 7.10", "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:"6.06", pkgname:"dhcp", pkgver:"2.0pl5-19.4ubuntu0.1")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"dhcp-client", pkgver:"2.0pl5-19.4ubuntu0.1")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"dhcp-relay", pkgver:"2.0pl5-19.4ubuntu0.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"dhcp", pkgver:"2.0pl5-19.4ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"dhcp-client", pkgver:"2.0pl5-19.4ubuntu1.1")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"dhcp-relay", pkgver:"2.0pl5-19.4ubuntu1.1")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"dhcp", pkgver:"2.0pl5-19.5ubuntu2.1")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"dhcp-client", pkgver:"2.0pl5-19.5ubuntu2.1")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"dhcp-relay", pkgver:"2.0pl5-19.5ubuntu2.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"dhcp", pkgver:"2.0pl5dfsg1-20ubuntu1.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"dhcp-client", pkgver:"2.0pl5dfsg1-20ubuntu1.1")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"dhcp-relay", pkgver:"2.0pl5dfsg1-20ubuntu1.1")) 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, "dhcp / dhcp-client / dhcp-relay");
}