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[ GLSA 200410-04 ] PHP: Memory disclosure and arbitrary location file upload
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GLSA
Bodhisattva
Bodhisattva


Joined: 25 Feb 2003
Posts: 3827
Location: Essen, Germany

PostPosted: Wed Oct 06, 2004 6:09 am    Post subject: [ GLSA 200410-04 ] PHP: Memory disclosure and arbitrary loca Reply with quote

Gentoo Linux Security Advisory

Title: PHP: Memory disclosure and arbitrary location file upload (GLSA 200410-04)
Severity: normal
Exploitable: remote
Date: October 06, 2004
Bug(s): #64223
ID: 200410-04

Synopsis

Two bugs in PHP may allow the disclosure of portions of memory and allow remote attackers to upload files to arbitrary locations.

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: dev-php/php
Vulnerable: < 4.3.9
Unaffected: >= 4.3.9
Architectures: All supported architectures

Package: dev-php/mod_php
Vulnerable: < 4.3.9
Unaffected: >= 4.3.9
Architectures: All supported architectures

Package: dev-php/php-cgi
Vulnerable: < 4.3.9
Unaffected: >= 4.3.9
Architectures: All supported architectures


Description

Stefano Di Paola discovered two bugs in PHP. The first is a parse error in php_variables.c that could allow a remote attacker to view the contents of the target machine's memory. Additionally, an array processing error in the SAPI_POST_HANDLER_FUNC() function inside rfc1867.c could lead to the $_FILES array being overwritten.

Impact

A remote attacker could exploit the first vulnerability to view memory contents. On a server with a script that provides file uploads, an attacker could exploit the second vulnerability to upload files to an arbitrary location. On systems where the HTTP server is allowed to write in a HTTP-accessible location, this could lead to remote execution of arbitrary commands with the rights of the HTTP server.

Workaround

There is no known workaround at this time.

Resolution

All PHP, mod_php and php-cgi users should upgrade to the latest stable version:
Code:
# emerge sync
# emerge -pv ">=dev-php/php-4.3.9"
# emerge ">=dev-php/php-4.3.9"
# emerge -pv ">=dev-php/mod_php-4.3.9"
# emerge ">=dev-php/mod_php-4.3.9"
# emerge -pv ">=dev-php/php-cgi-4.3.9"
# emerge ">=dev-php/php-cgi-4.3.9"


References

Secunia Advisory
BugTraq post regarding the php_variables.c issue
BugTraq post regarding the rfc1867.c issue


Last edited by GLSA on Sat Aug 23, 2008 4:17 am; edited 5 times in total
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