Bug 824302 (CVE-2013-3239)

Public via PMASA-2013-3:

http://www.phpmyadmin.net/home_page/security/PMASA-2013-3.php


 PMASA-2013-3
 ------------

Announcement-ID: PMASA-2013-3

Date: 2013-04-24

Summary:

Locally Saved SQL Dump File Multiple File Extension Remote Code Execution.

Description:

phpMyAdmin can be configured to save an export file on the web server, via its SaveDir directive. With this in place, it's possible, either via a crafted filename template or a crafted table name, to save a double extension file like foobar.php.sql. In turn, an Apache webserver on which there is no definition for the MIME type "sql" (the default) will treat this saved file as a ".php" script, leading to remote code execution.

Severity:

We consider this vulnerability to be serious.

Mitigation factor:

This vulnerability can be triggered only by someone who logged in to phpMyAdmin, as the usual token protection prevents non-logged-in users to access the required form. Moreover, the SaveDir directive is empty by default, so a default configuration is not vulnerable. The $cfg['SaveDir'] directive must be configured, and the server must be running Apache with mod_mime to be exploitable.

Affected Versions:

Versions 3.5.x and 4.0.0 (before -rc3) are affected.
Solution

For 3.5.x, upgrade to phpMyAdmin 3.5.8 or newer; for 4.0.x, upgrade to 4.0.0-rc3 or newer. You can also apply the patches listed below.

References:

Thanks to Janek Vind for reporting this issue.

Assigned CVE ids: CVE-2013-3239
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-3239

CWE ids: CWE-661 CWE-94 
http://cwe.mitre.org/data/definitions/661.html
http://cwe.mitre.org/data/definitions/94.html

Patches:

The following commits have been made on the 3.5 branch to fix this issue:
https://github.com/phpmyadmin/phpmyadmin/commit/d3fafdfba0807068196655e9b6d16c5d1d3ccf8a
https://github.com/phpmyadmin/phpmyadmin/commit/1f6bc0b707002e26cab216b9e57b4d5de764de48