Vulnerability Note VU#663763
Apache mod_proxy_ftp XSS vulnerability
OverviewThe Apache web server mod_proxy_ftp module contains a cross-site scripting (XSS) vulnerability.
I. DescriptionThe 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.II. ImpactA remote attacker may be able to execute arbitrary Javascript in the context of a site being proxied by the Apache server.III. SolutionUpgrade
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.
Systems Affected
References
http://www.securityfocus.com/archive/1/495180
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
http://ftpsearch.ntua.gr/globbing.html
http://noscript.net/
Credit
Thanks to Rapid7 and Apache for information that was used in this report.
This document was written by Ryan Giobbi.
Other Information
| Date Public | 08/06/2008 |
| Date First Published | 08/08/2008 09:11:52 AM |
| Date Last Updated | 08/08/2008 |
| CERT Advisory | |
| CVE Name | CVE-2008-2939 |
| Metric | 2.70 |
| Document Revision | 16 |
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