GLSA-200807-03 : PCRE: Buffer overflow

2008-07-10T00:00:00
ID GENTOO_GLSA-200807-03.NASL
Type nessus
Reporter Tenable
Modified 2015-08-10T00:00:00

Description

The remote host is affected by the vulnerability described in GLSA-200807-03 (PCRE: Buffer overflow)

Tavis Ormandy of the Google Security team reported a heap-based buffer     overflow when compiling regular expression patterns containing     'Internal Option Settings' such as '(?i)'.

Impact :

A remote attacker could exploit this vulnerability by sending a     specially crafted regular expression to an application making use of     the PCRE library, which could possibly lead to the execution of     arbitrary code or a Denial of Service.

Workaround :

There is no known workaround at this time.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 200807-03.
#
# The advisory text is Copyright (C) 2001-2015 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike 
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#

include("compat.inc");

if (description)
{
  script_id(33460);
  script_version("$Revision: 1.12 $");
  script_cvs_date("$Date: 2015/08/10 14:35:57 $");

  script_cve_id("CVE-2008-2371");
  script_osvdb_id(46690);
  script_xref(name:"GLSA", value:"200807-03");

  script_name(english:"GLSA-200807-03 : PCRE: Buffer overflow");
  script_summary(english:"Checks for updated package(s) in /var/db/pkg");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote Gentoo host is missing one or more security-related
patches."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"The remote host is affected by the vulnerability described in GLSA-200807-03
(PCRE: Buffer overflow)

    Tavis Ormandy of the Google Security team reported a heap-based buffer
    overflow when compiling regular expression patterns containing
    'Internal Option Settings' such as '(?i)'.
  
Impact :

    A remote attacker could exploit this vulnerability by sending a
    specially crafted regular expression to an application making use of
    the PCRE library, which could possibly lead to the execution of
    arbitrary code or a Denial of Service.
  
Workaround :

    There is no known workaround at this time."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security.gentoo.org/glsa/200807-03"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"All PCRE users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=dev-libs/libpcre-7.7-r1'
    All GLib users should upgrade to the latest version:
    # emerge --sync
    # emerge --ask --oneshot --verbose '>=dev-libs/glib-2.16.3-r1'"
  );
  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:gentoo:linux:glib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:libpcre");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");

  script_set_attribute(attribute:"patch_publication_date", value:"2008/07/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2008/07/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2008-2015 Tenable Network Security, Inc.");
  script_family(english:"Gentoo Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Gentoo/release", "Host/Gentoo/qpkg-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("qpkg.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (qpkg_check(package:"dev-libs/libpcre", unaffected:make_list("ge 7.7-r1"), vulnerable:make_list("lt 7.7-r1"))) flag++;
if (qpkg_check(package:"dev-libs/glib", unaffected:make_list("ge 2.16.3-r1", "lt 2.14.0"), vulnerable:make_list("lt 2.16.3-r1"))) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:qpkg_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = qpkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "PCRE");
}