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TITLE:
WeeChat SSL Certificate Validation Security Issue

SECUNIA ADVISORY ID:
SA43543

VERIFY ADVISORY:
Secunia.com
https://secunia.com/advisories/43543/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43543

RELEASE DATE:
2011-03-19

DISCUSS ADVISORY:
https://secunia.com/advisories/43543/#comments

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

https://secunia.com/advisories/43543/

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=43543

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

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

DESCRIPTION:
JD has discovered a security issue in WeeChat, which can be exploited
by malicious people to conduct spoofing attacks.

The security issue is caused due to the application not verifying the
validity of the SSL certificates presented when logging in to a server
which does not request a client certificate during the handshake. This
can be exploited to spoof a valid server and e.g. conduct
Man-in-the-Middle (MitM) attacks.

The security issue is confirmed in version 0.3.4. Other versions may
also be affected.

SOLUTION:
Do not rely on the certificate checks.

PROVIDED AND/OR DISCOVERED BY:
JD

ORIGINAL ADVISORY:
https://archives.neohapsis.com/archives/fulldisclosure/2011-02/0671.html
https://savannah.nongnu.org/patch/index.php?7459

OTHER REFERENCES:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
https://secunia.com/products/corporate/EVM/

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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
https://secunia.com/advisories/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
https://secunia.com/advisories/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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