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Apache mod_proxy_ftp XSS vulnerability

Vulnerability Note VU#663763

Original Release Date: 2008-08-08 | Last Revised: 2008-08-08

Overview

The Apache web server mod_proxy_ftp module contains a cross-site scripting (XSS) vulnerability.

Description

The Apache mod_proxy_ftp module allows the Apache web server to act as a proxy for FTP sites. Filename globbing is the process of using wildcards to match filenames. The mod_proxy_ftp module contains an XSS vulnerability that occurs because the module does not properly filter globbed characters in FTP URIs.

Impact

A remote attacker may be able to execute arbitrary Javascript in the context of a site being proxied by the Apache server.

Solution

Upgrade

Apache has released updates to address this issue. These updates are available on the Apache SVN server:
http://svn.apache.org/viewvc?view=rev&revision=682868
http://svn.apache.org/viewvc?view=rev&revision=682870
http://svn.apache.org/viewvc?view=rev&revision=682871

Note that vendors who distribute Apache may not have immediately have a version or update that contains these fixes.

Workarounds

    • Mozilla Firefox users can use the NoScript extension to keep Javascript from running in untrusted domains.
    • Application firewalls and IPS systems may be able to block certain types of XSS attacks at the network perimeter.

Vendor Information

663763
 
Affected   Unknown   Unaffected

Apache HTTP Server Project

Updated:  August 08, 2008

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

See the below links for more details.

http://svn.apache.org/viewvc?view=rev&revision=682868
http://svn.apache.org/viewvc?view=rev&revision=682870
http://svn.apache.org/viewvc?view=rev&revision=682871

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

Thanks to Rapid7 and Apache for information that was used in this report.

This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2008-2939
Severity Metric: 2.70
Date Public: 2008-08-06
Date First Published: 2008-08-08
Date Last Updated: 2008-08-08 19:17 UTC
Document Revision: 16

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.