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WordPress Pingback Denial of Service Security Issue

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Release Date:  2007-04-19    Last Update:  2007-04-20    Views:  16,178

Secunia Advisory SA24951

Where:

From remote

Impact:

DoS

Solution Status:

Unpatched

Software:

CVE Reference(s):

No CVE references.

Description


foobarwp12 has reported a security issue in WordPress, which potentially can be exploited by malicious people to cause a DoS (Denial of Service).

The security issue is caused due to WordPress not verifying pingback URLs or limiting the maximum size of files to be downloaded during the pingback process. This can be exploited to cause high bandwidth usage by sending multiple pingbacks containing URLs to large files.

The security issue is confirmed in version 2.1.3. Other versions may also be affected.


Solution:
Edit the source code to ensure that pingback URLs are properly verified and no large files can be downloaded.

Provided and/or discovered by:
Reported in a WordPress bug by foobarwp12. Also reported by Blake Matheny.

Original Advisory:
http://trac.wordpress.org/ticket/4137

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: WordPress Pingback Denial of Service Security Issue

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