[NEWS] Multiple Vendor libpurple MSN Protocol SLP Message Heap Overflow Vulnerability

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  Multiple Vendor libpurple MSN Protocol SLP Message Heap Overflow 
Vulnerability
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SUMMARY

A vulnerability allows remote attackers to execute arbitrary code on 
systems with vulnerable installations of messaging applications that make 
use of the libpurple library (such as Pidgin). User interaction is not 
required to exploit this vulnerability.

DETAILS

Vulnerable Systems:
 * libpurple version 2.4.2 and prior

Immune Systems:
 * libpurple version 2.4.3

The specific flaw exists in the implementation of the MSN protocol, 
specifically the handling of SLP messages. The function 
msn_slplink_process_msg() fails to properly validate an offset value 
specified in the SLP packet. By providing a specific value, an attacker 
can overflow a heap buffer resulting in arbitrary code execution.

Vendor Response:
Pidgin has issued an update to correct this vulnerability. More details 
can be found at:
 <http://www.pidgin.im/news/security/?id=25> 
http://www.pidgin.im/news/security/?id=25

Disclosure Timeline:
2008-05-27 - Vulnerability reported to vendor
2008-08-28 - Coordinated public release of advisory

CVE Information:
 <http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2927> 
CVE-2008-2927


ADDITIONAL INFORMATION

The information has been provided by  <mailto:[email protected]> 
The Zero Day Initiative (ZDI).
The original article can be found at:  
<http://www.pidgin.im/news/security/?id=25> 
http://www.pidgin.im/news/security/?id=25



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