GLSA 200603-22: PHP: Format string and XSS vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	PHP: Format string and XSS vulnerabilities
Date:	03/22/2006
Bugs:	#125878
ID:	200603-22

Synopsis

Multiple vulnerabilities in PHP allow remote attackers to inject arbitrary HTTP headers, perform cross site scripting or in some cases execute arbitrary code.

Background

PHP is a general-purpose scripting language widely used to develop web-based applications. It can run on a web server with the mod_php module or the CGI version and also stand-alone in a CLI.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-lang/php	< 4.4.2	>= 5.1.2	All supported architectures

Description

Stefan Esser of the Hardened PHP project has reported a few vulnerabilities found in PHP:

Input passed to the session ID in the session extension isn't properly sanitised before being returned to the user via a "Set-Cookie" HTTP header, which can contain arbitrary injected data.
A format string error while processing error messages using the mysqli extension in version 5.1 and above.

Impact

By sending a specially crafted request, a remote attacker can exploit this vulnerability to inject arbitrary HTTP headers, which will be included in the response sent to the user. The format string vulnerability may be exploited to execute arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All PHP 5.x users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/php-5.1.2"

All PHP 4.x users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-lang/php-4.4.2"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200603-22.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.