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Category:   Application (Instant Messaging/IRC/Chat)  >   Pidgin Vendors:   pidgin.im
Pidgin Bugs Let Remote Users Deny Service and Potentially Execute Arbitrary Code
SecurityTracker Alert ID:  1025961
SecurityTracker URL:  http://securitytracker.com/id/1025961
CVE Reference:   CVE-2011-2943   (Links to External Site)
Date:  Aug 22 2011
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 2.10.0
Description:   Several vulnerabilities were reported in Pidgin. A remote user can cause denial of service conditions. A remote user can cause arbitrary code to be executed on the target user's system.

A remote user can send specially crafted nickname characters in response to a WHO request to trigger a null pointer dereference in the IRC protocol plugin and cause the target user's client to crash [CVE-2011-2943]. Djego Ibanez, Lead QA at Gamistry, reported this vulnerability.

A remote user can send specially crafted HTTP 100 responses to trigger a memory access error in the MSN protocol plugin and cause the target user's client to crash. Marius Wachtler reported this vulnerability. Only users with the HTTP connection method enabled [not the default setting] are affected.

A remote user can create a specially crafted file:// URI that, when loaded by the target user, will execute the specified file. James Burton, Insomnia Security, reported this vulnerability.

Impact:   A remote user can create a URI that, when loaded by the target user, will execute arbitrary code on the target user's system.

A remote user can cause denial of service conditions.

Solution:   The vendor has issued a fix (2.10.0).

The vendor's advisories are available at:

http://pidgin.im/news/security/?id=53
http://pidgin.im/news/security/?id=54
http://pidgin.im/news/security/?id=55

Vendor URL:  pidgin.im/news/security/?id=53 (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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