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Red Hat Security Advisory 2012-0570-01

Red Hat Security Advisory 2012-0570-01
Posted May 11, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0570-01 - PHP is an HTML-embedded scripting language commonly used with the Apache HTTP Server. A flaw was found in the way the php-cgi executable processed command line arguments when running in CGI mode. A remote attacker could send a specially-crafted request to a PHP script that would result in the query string being parsed by php-cgi as command line options and arguments. This could lead to the disclosure of the script's source code or arbitrary code execution with the privileges of the PHP interpreter. Red Hat is aware that a public exploit for this issue is available that allows remote code execution in affected PHP CGI configurations. This flaw does not affect the default configuration using the PHP module for Apache httpd to handle PHP scripts.

tags | advisory, remote, web, arbitrary, cgi, php, code execution
systems | linux, redhat
advisories | CVE-2012-1823
MD5 | 389ac7e915aacd5b11e598fba17e61a7

Red Hat Security Advisory 2012-0570-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Critical: php security update
Advisory ID: RHSA-2012:0570-01
Product: Red Hat Application Stack
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0570.html
Issue date: 2012-05-11
CVE Names: CVE-2012-1823
=====================================================================

1. Summary:

Updated php packages that fix one security issue are now available for
Red Hat Application Stack v2.

The Red Hat Security Response Team has rated this update as having critical
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Relevant releases/architectures:

Red Hat Application Stack v2 for Enterprise Linux (v.5) - i386, x86_64

3. Description:

PHP is an HTML-embedded scripting language commonly used with the Apache
HTTP Server.

A flaw was found in the way the php-cgi executable processed command line
arguments when running in CGI mode. A remote attacker could send a
specially-crafted request to a PHP script that would result in the query
string being parsed by php-cgi as command line options and arguments. This
could lead to the disclosure of the script's source code or arbitrary code
execution with the privileges of the PHP interpreter. (CVE-2012-1823)

Red Hat is aware that a public exploit for this issue is available that
allows remote code execution in affected PHP CGI configurations. This flaw
does not affect the default configuration using the PHP module for Apache
httpd to handle PHP scripts.

All php users should upgrade to these updated packages, which contain a
backported patch to resolve this issue. After installing the updated
packages, the httpd daemon must be restarted for the update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

818607 - CVE-2012-1823 php: command line arguments injection when run in CGI mode (VU#520827)

6. Package List:

Red Hat Application Stack v2 for Enterprise Linux (v.5):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/RHWAS/SRPMS/php-5.2.10-2.el5s2.src.rpm

i386:
php-5.2.10-2.el5s2.i386.rpm
php-bcmath-5.2.10-2.el5s2.i386.rpm
php-cli-5.2.10-2.el5s2.i386.rpm
php-common-5.2.10-2.el5s2.i386.rpm
php-dba-5.2.10-2.el5s2.i386.rpm
php-debuginfo-5.2.10-2.el5s2.i386.rpm
php-devel-5.2.10-2.el5s2.i386.rpm
php-gd-5.2.10-2.el5s2.i386.rpm
php-imap-5.2.10-2.el5s2.i386.rpm
php-ldap-5.2.10-2.el5s2.i386.rpm
php-mbstring-5.2.10-2.el5s2.i386.rpm
php-mysql-5.2.10-2.el5s2.i386.rpm
php-ncurses-5.2.10-2.el5s2.i386.rpm
php-odbc-5.2.10-2.el5s2.i386.rpm
php-pdo-5.2.10-2.el5s2.i386.rpm
php-pgsql-5.2.10-2.el5s2.i386.rpm
php-snmp-5.2.10-2.el5s2.i386.rpm
php-soap-5.2.10-2.el5s2.i386.rpm
php-xml-5.2.10-2.el5s2.i386.rpm
php-xmlrpc-5.2.10-2.el5s2.i386.rpm

x86_64:
php-5.2.10-2.el5s2.x86_64.rpm
php-bcmath-5.2.10-2.el5s2.x86_64.rpm
php-cli-5.2.10-2.el5s2.x86_64.rpm
php-common-5.2.10-2.el5s2.x86_64.rpm
php-dba-5.2.10-2.el5s2.x86_64.rpm
php-debuginfo-5.2.10-2.el5s2.x86_64.rpm
php-devel-5.2.10-2.el5s2.x86_64.rpm
php-gd-5.2.10-2.el5s2.x86_64.rpm
php-imap-5.2.10-2.el5s2.x86_64.rpm
php-ldap-5.2.10-2.el5s2.x86_64.rpm
php-mbstring-5.2.10-2.el5s2.x86_64.rpm
php-mysql-5.2.10-2.el5s2.x86_64.rpm
php-ncurses-5.2.10-2.el5s2.x86_64.rpm
php-odbc-5.2.10-2.el5s2.x86_64.rpm
php-pdo-5.2.10-2.el5s2.x86_64.rpm
php-pgsql-5.2.10-2.el5s2.x86_64.rpm
php-snmp-5.2.10-2.el5s2.x86_64.rpm
php-soap-5.2.10-2.el5s2.x86_64.rpm
php-xml-5.2.10-2.el5s2.x86_64.rpm
php-xmlrpc-5.2.10-2.el5s2.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2012-1823.html
https://access.redhat.com/security/updates/classification/#critical

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2012 Red Hat, Inc.
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