Serendipity Input Validation Flaws in Processing Request URI and HTTP Referer Field May Permit HTTP Response Splitting Attacks
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SecurityTracker Alert ID: 1011864 |
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SecurityTracker URL: http://securitytracker.com/id/1011864
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CVE Reference:
GENERIC-MAP-NOMATCH
(Links to External Site)
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Updated: Oct 22 2004
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Original Entry Date: Oct 21 2004
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Impact:
Modification of system information, Modification of user information
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Fix Available: Yes Vendor Confirmed: Yes Exploit Included: Yes
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Version(s): prior to 0.7-rc1; tested on 0.7-beta4
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Description:
An input validation vulnerability was reported in Serendipity. A remote user can conduct HTTP response splitting attacks.
The vendor reported that a remote user may be able to cause the target server to return a split response. A remote user can exploit this to spoof content on the target server, attempt to poison any intermediate web caches, or conduct cross-site scripting attacks.
The processing of the requested URI in 'index.php' and of the HTTP Referer field in 'comments.php' is affected.
Chaotic Evil later provided a demonstration exploit URL [with Base64 encoding for the 'url' parameter value]:
http://[target]/serendipity/exit.php?url=DQpDb25uZWN0aW9uOiBLZWVwLUFsaXZlDQpDb
250ZW50LUxlbmd0aDogMA0KDQpIVFRQLzEuMCAyMDAgT0sNCkNvbnRlbnQtTGVuZ3RoOiAyMQ0KQ
29udGVudC1UeXBlOiB0ZXh0L2h0bWwNCg0KPGh0bWw%2bKmRlZmFjZWQqPC9odG1sPg%3d%3d
The vendor was notified on October 14, 2004.
The vendor credits Chaotic Evil with reporting this flaw.
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Impact:
A remote user can create an HTTP request that, when submitted by the target user, will cause arbitrary content to be displayed.
A remote user may be able to poison any intermediate web caches with arbitrary content.
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Solution:
The vendor has released a fixed version (0.7-rc1), available at:
http://www.s9y.org/12.html
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Vendor URL: www.s9y.org/ (Links to External Site)
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Cause:
Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Message History:
None.
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Source Message Contents
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[Original Message Not Available for Viewing]
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