Vulnerability Note VU#258555

Overview

OpenSSL is an open-source implementation of the Secure Sockets Layer (SSL) protocol. A remotely exploitable vulnerability exists in OpenSSL clients that could lead to the execution of arbitrary code on the client's system.

Description

OpenSSL clients using SSLv3 prior to version 0.9.6e and pre-release version 0.9.7-beta2 contain a buffer overflow vulnerability. A malicious server can exploit this by sending a large session ID to the client during the handshake process.

Impact

A remote attacker may be able to execute arbitrary code on the client system with the privileges of the current user.

Solution

Apply the relevant patches to the OpenSSL client or upgrade to OpenSSL 0.9.6e. Note that applications statically linking to OpenSSL libraries may need to be recompiled with the corrected version of OpenSSL.

Systems Affected (Learn More)

Vendor	Status	Date Notified	Date Updated
Alcatel	Affected	29 Jul 2002	20 Sep 2002
Apple Computer Inc.	Affected	29 Jul 2002	09 Aug 2002
Debian	Affected	29 Jul 2002	09 Aug 2002
Gentoo Linux	Affected	-	09 Aug 2002
Guardian Digital	Affected	29 Jul 2002	09 Aug 2002
Hewlett-Packard Company	Affected	29 Jul 2002	09 Aug 2002
IBM	Affected	29 Jul 2002	09 Aug 2002
Juniper Networks	Affected	29 Jul 2002	16 Aug 2002
MandrakeSoft	Affected	-	23 Sep 2002
NetBSD	Affected	29 Jul 2002	23 Sep 2002
OpenLDAP	Affected	29 Jul 2002	09 Aug 2002
OpenPKG	Affected	-	09 Aug 2002
OpenSSL	Affected	22 Jul 2002	30 Jul 2002
Oracle	Affected	29 Jul 2002	09 Aug 2002
Red Hat Inc.	Affected	29 Jul 2002	09 Aug 2002

If you are a vendor and your product is affected, let us know.View More »

CVSS Metrics (Learn More)

Group	Score	Vector
Base	N/A	N/A
Temporal	N/A	N/A
Environmental	N/A	N/A

References

• http://www.kb.cert.org/vuls/id/102795
• http://www.kb.cert.org/vuls/id/308891
• http://www.kb.cert.org/vuls/id/561275
• http://www.kb.cert.org/vuls/id/748355
• http://wp.netscape.com/eng/ssl3/draft302.txt
• http://www.securityfocus.com/bid/5362

Credit

Thanks to A.L. Digital Ltd for discovering and reporting on this vulnerability.

This document was written by Jason A Rafail and Jeffrey S. Havrilla.

Other Information

• CVE IDs: CAN-2002-0656
• CERT Advisory: CA-2002-23
• Date Public: 30 Jul 2002
• Date First Published: 30 Jul 2002
• Date Last Updated: 30 Sep 2002
• Severity Metric: 3.19
• Document Revision: 37