PHP: Multiple vulnerabilities

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 and also stand-alone in a CLI.

Description

Multiple vulnerabilities have been found and fixed in PHP:

• a possible $GLOBALS variable overwrite problem through file upload handling, extract() and import_request_variables() (CVE-2005-3390)
• a local Denial of Service through the use of the session.save_path option (CVE-2005-3319)
• an issue with trailing slashes in allowed basedirs (CVE-2005-3054)
• an issue with calling virtual() on Apache 2, allowing to bypass safe_mode and open_basedir restrictions (CVE-2005-3392)
• a problem when a request was terminated due to memory_limit constraints during certain parse_str() calls (CVE-2005-3389)
• The curl and gd modules allowed to bypass the safe mode open_basedir restrictions (CVE-2005-3391)
• a cross-site scripting (XSS) vulnerability in phpinfo() (CVE-2005-3388)

Impact

Attackers could leverage these issues to exploit applications that are assumed to be secure through the use of proper register_globals, safe_mode or open_basedir parameters. Remote attackers could also conduct cross-site scripting attacks if a page calling phpinfo() was available. Finally, a local attacker could cause a local Denial of Service using malicious session.save_path options.

Workaround

There is no known workaround that would solve all issues at this time.

Resolution

All PHP users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose dev-php/php

All mod_php users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose dev-php/mod_php

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

 # emerge --sync
 # emerge --ask --oneshot --verbose dev-php/php-cgi