Ubuntu 6.06 LTS / 6.10 / 7.04 / 7.10 : pcre3 vulnerability (USN-581-1)

2008-02-25T00:00:00
ID UBUNTU_USN-581-1.NASL
Type nessus
Reporter Tenable
Modified 2018-11-28T00:00:00

Description

It was discovered that PCRE did not correctly handle very long strings containing UTF8 sequences. In certain situations, an attacker could exploit applications linked against PCRE by tricking a user or automated system in processing a malicious regular expression leading to a denial of service or possibly arbitrary code execution.

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-581-1. 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(31166);
  script_version("1.16");
  script_cvs_date("Date: 2018/11/28 11:42:05");

  script_cve_id("CVE-2008-0674");
  script_bugtraq_id(27786);
  script_xref(name:"USN", value:"581-1");

  script_name(english:"Ubuntu 6.06 LTS / 6.10 / 7.04 / 7.10 : pcre3 vulnerability (USN-581-1)");
  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 PCRE did not correctly handle very long strings
containing UTF8 sequences. In certain situations, an attacker could
exploit applications linked against PCRE by tricking a user or
automated system in processing a malicious regular expression leading
to a denial of service or possibly arbitrary code execution.

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/581-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected 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_cwe_id(119);

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpcre3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpcre3-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpcrecpp0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:pcregrep");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:pgrep");
  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:"2008/02/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/02/25");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2008-2018 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:"libpcre3", pkgver:"7.4-0ubuntu0.6.06.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"libpcre3-dev", pkgver:"7.4-0ubuntu0.6.06.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"libpcrecpp0", pkgver:"7.4-0ubuntu0.6.06.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"pcregrep", pkgver:"7.4-0ubuntu0.6.06.2")) flag++;
if (ubuntu_check(osver:"6.06", pkgname:"pgrep", pkgver:"7.4-0ubuntu0.6.06.2")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"libpcre3", pkgver:"7.4-0ubuntu0.6.10.2")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"libpcre3-dev", pkgver:"7.4-0ubuntu0.6.10.2")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"libpcrecpp0", pkgver:"7.4-0ubuntu0.6.10.2")) flag++;
if (ubuntu_check(osver:"6.10", pkgname:"pcregrep", pkgver:"7.4-0ubuntu0.6.10.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"libpcre3", pkgver:"7.4-0ubuntu0.7.04.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"libpcre3-dev", pkgver:"7.4-0ubuntu0.7.04.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"libpcrecpp0", pkgver:"7.4-0ubuntu0.7.04.2")) flag++;
if (ubuntu_check(osver:"7.04", pkgname:"pcregrep", pkgver:"7.4-0ubuntu0.7.04.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"libpcre3", pkgver:"7.4-0ubuntu0.7.10.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"libpcre3-dev", pkgver:"7.4-0ubuntu0.7.10.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"libpcrecpp0", pkgver:"7.4-0ubuntu0.7.10.2")) flag++;
if (ubuntu_check(osver:"7.10", pkgname:"pcregrep", pkgver:"7.4-0ubuntu0.7.10.2")) 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, "libpcre3 / libpcre3-dev / libpcrecpp0 / pcregrep / pgrep");
}