Ubuntu 6.06 LTS / 7.04 / 7.10 / 8.04 LTS : postfix vulnerability (USN-636-1)

#%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-636-1. 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(33941);
  script_version("1.17");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2008-2936");
  script_bugtraq_id(30691);
  script_xref(name:"USN", value:"636-1");

  script_name(english:"Ubuntu 6.06 LTS / 7.04 / 7.10 / 8.04 LTS : postfix vulnerability (USN-636-1)");
  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:
"Sebastian Krahmer discovered that Postfix was not correctly handling
mailbox ownership when dealing with Linux's implementation of
hardlinking to symlinks. In certain mail spool configurations, a local
attacker could exploit this to append data to arbitrary files as the
root user. The default Ubuntu configuration was not vulnerable.

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/636-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/C:C/I:C/A:C");
  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_set_attribute(attribute:"exploited_by_malware", value:"true");
  script_cwe_id(264);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix-cdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix-ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix-pcre");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:postfix-pgsql");
  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:7.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:7.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:8.04:-:lts");

  script_set_attribute(attribute:"vuln_publication_date", value:"2008/08/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2008/08/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/08/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2008-2021 Canonical, Inc. / NASL script (C) 2008-2021 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|7\.04|7\.10|8\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 6.06 / 7.04 / 7.10 / 8.04", "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:"6.06", pkgname:"postfix", pkgver:"2.2.10-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"postfix-dev", pkgver:"2.2.10-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"postfix-doc", pkgver:"2.2.10-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"postfix-ldap", pkgver:"2.2.10-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"postfix-mysql", pkgver:"2.2.10-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"postfix-pcre", pkgver:"2.2.10-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"postfix-pgsql", pkgver:"2.2.10-1ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix-cdb", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix-dev", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix-doc", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix-ldap", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix-mysql", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix-pcre", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"postfix-pgsql", pkgver:"2.3.8-2ubuntu0.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix-cdb", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix-dev", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix-doc", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix-ldap", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix-mysql", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix-pcre", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"postfix-pgsql", pkgver:"2.4.5-3ubuntu1.2")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix", pkgver:"2.5.1-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix-cdb", pkgver:"2.5.1-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix-dev", pkgver:"2.5.1-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix-doc", pkgver:"2.5.1-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix-ldap", pkgver:"2.5.1-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix-mysql", pkgver:"2.5.1-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix-pcre", pkgver:"2.5.1-2ubuntu1.1")) flag++;
if (ubuntu_check(osver:"8.04", pkgname:"postfix-pgsql", pkgver:"2.5.1-2ubuntu1.1")) 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, "postfix / postfix-cdb / postfix-dev / postfix-doc / postfix-ldap / etc");
}