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SECURITY VULNERABILITY ANNOUNCEMENT
January 6, 2006

     Advisory: PEAR installer arbitrary code execution vulnerability
 Release Date: 2006/01/06
Last Modified: 2006/01/07
       Author: Gregory Beaver [cellog@php.net]

  Application: PEAR installer 1.0 - 1.3.5 (version 1.4.0+ are not
affected)
     Severity: A flaw in file conflict checking can result in existing
files
               being overwritten, allowing surreptitious modification
of existing
               PEAR files without the user's knowledge.
         Risk: Medium
Vendor Status: The PEAR project has released an updated version
   References: http://pear.php.net/advisory-20060108.txt


Overview:

  The PEAR installer is available from http://pear.php.net/package/PEAR.
The PEAR installer is used to install PHP-based software packages
distributed from pear.php.net and PHP extensions from pecl.php.net.

A bug in file conflict checking allows any installed file to be
overwritten
without warning or error.

Details:

  To be vulnerable, a user must explicitly install a publicly released
malicious package using the PEAR installer, or explicitly install a
package that depends on a malicious package.

Full details of the vulnerability will be released at a later date.

Proof of concept:

  The PEAR development team will not release an example exploit to the
public.

Disclosure Timeline:

  18. September 2005 - fixed version of PEAR released (vulnerability
not recognized as security issue)
  06. January 2006 - vulnerability discovered by Gregory Beaver
  06. January 2006 - Public disclosure
  07. January 2006 - Date typos corrected in advisory announcement

Recommendation:

  We strongly recommend to upgrade to the new version

  PEAR 1.4.6
  pear upgrade PEAR-1.4.6
  http://pear.php.net/get/PEAR-1.4.6.tgz

GPG-Key:

  http://pgp.mit.edu:11371/pks/lookup?search=0x1F81E560&op=get

  pub  1024D/1F81E560 2004/12/30 Greg Beaver <greg@chiaraquartet.net>
  Key fingerprint = B064 E549 8D51 712E 40E8  F9A1 B769 2595 1F81 E560

Copyright 2006, The PHP Group.
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