GLSA 200504-15: PHP: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	high
Title:	PHP: Multiple vulnerabilities
Date:	04/18/2005
Bugs:	#87517
ID:	200504-15

Synopsis

Several vulnerabilities were found and fixed in PHP image handling functions, potentially resulting in Denial of Service conditions or the remote execution of arbitrary code.

Background

PHP is a general-purpose scripting language widely used to develop web-based applications. It can run inside a web server using the mod_php module or the CGI version of PHP, or can run stand-alone in a CLI.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-php/php	< 4.3.11	>= 4.3.11	All supported architectures
dev-php/mod_php	< 4.3.11	>= 4.3.11	All supported architectures
dev-php/php-cgi	< 4.3.11	>= 4.3.11	All supported architectures

Description

An integer overflow and an unbound recursion were discovered in the processing of Image File Directory tags in PHP's EXIF module (CAN-2005-1042, CAN-2005-1043). Furthermore, two infinite loops have been discovered in the getimagesize() function when processing IFF or JPEG images (CAN-2005-0524, CAN-2005-0525).

Impact

A remote attacker could craft an image file with a malicious EXIF IFD tag, a large IFD nesting level or invalid size parameters and send it to a web application that would process this user-provided image using one of the affected functions. This could result in denying service on the attacked server and potentially executing arbitrary code with the rights of the web server.

Workaround

There is no known workaround at this time.

Resolution

All PHP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-php/php-4.3.11"

All mod_php users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-php/mod_php-4.3.11"

All php-cgi users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-php/php-cgi-4.3.11"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200504-15.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.