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TITLE:
Pidgin Denial of Service Weaknesses and "file://" Security Issue

SECUNIA ADVISORY ID:
SA45663

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/45663/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=45663

RELEASE DATE:
2011-08-23

DISCUSS ADVISORY:
http://secunia.com/advisories/45663/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/45663/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=45663

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Two weaknesses and a security issue have been reported in Pidgin,
which can be exploited by malicious people to cause a DoS (Denial of
Service) and compromise a user's system.

1) An error within the IRC protocol plugin when handling WHO
responses with certain characters in the nickname can be exploited to
cause a NULL pointer dereference.

2) An error within the MSN protocol plugin when parsing HTTP 100
responses can be exploited to crash the application.

Successful exploitation of this weakness requires that the HTTP
connection method is enabled (disabled by default) and that a
malicious server is used.

3) The application executes "file://" URIs when clicked, which can be
exploited by e.g. tricking a user into clicking a "file://" URI
pointing to a malicious executable on a remote network share.

Note: This security issue affects the Windows platform only.

SOLUTION:
Update to version 2.10.0.

PROVIDED AND/OR DISCOVERED BY:
3) James Burton, Insomnia Security

The vendor credits:
1) Djego Ibanez, Gamistry
2) Marius Wachtler

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

Insomnia Security:
http://www.insomniasec.com/advisories/ISVA-110822.1.htm

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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About:
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private users keeping their systems up to date against the latest
vulnerabilities.

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