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TITLE:
Pidgin Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA36384

VERIFY ADVISORY:
http://secunia.com/advisories/36384/

DESCRIPTION:
A vulnerability, a security issue, and a weakness have been reported
in Pidgin, which can be exploited by malicious people to disclose
sensitive information, cause a DoS (Denial of Service), or
potentially compromise a user's system.

1) An error in the "msn_slplink_process_msg()" function when
processing MSN SLP messages can be exploited to corrupt memory.

Successful exploitation may allow execution of arbitrary code.

The vulnerability is reported in versions 2.5.8 and prior. Other
versions may also be affected.

2) The application connects to Jabberd servers that are not fully
compliant with the XMPP specifications without encryption, even if
the "Require SSL/TLS" setting is configured. This can be exploited to
potentially disclose sensitive information transmitted during an XMPP
session.  

The security issue is reported in versions prior to 2.6.0.

3) An error when processing links received via the Yahoo Messenger
protocol can be exploited to crash the application.

The weakness is reported in version 2.6.0.

SOLUTION:
Update to version 2.6.1.

PROVIDED AND/OR DISCOVERED BY:
1) Federico Muttis, Core Security Technologies
2) Reported by bugdave in a Pidgin bug report.
3) Reported by adk in a Pidgin bug report.

CHANGELOG:
2009-08-24: Updated "Solution" section. Added vulnerabilities #2 and
#3 to the advisory. Updated credits and the "Original Advisory"
section.

ORIGINAL ADVISORY:
Pidgin:
http://www.pidgin.im/news/security/?id=32
http://www.pidgin.im/news/security/?id=35

Core Security Technologies:
http://www.coresecurity.com/content/libpurple-arbitrary-write

Pidgin Trac:
http://developer.pidgin.im/ticket/8131
http://developer.pidgin.im/ticket/9946

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