Vulnerability Note VU#561275

OpenSSL servers contain a remotely exploitable buffer overflow vulnerability during the SSL3 handshake process

Overview

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

I. Description

Servers running OpenSSL pre-release version 0.9.7 with Kerberos enabled, contain a remotely exploitable buffer overflow vulnerability. This vulnerability can be exploited by a malicious client sending a malformed key during the SSLv3 handshake process with the server.

II. Impact

A remote attacker may be able to execute arbitrary code on the server with the privileges of the exploited application or service.

III. Solution

OpenSSL Clients should apply the patches provided by your vendors, 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

Vendor	Status	Date Updated
Apache	Unknown	9-Aug-2002
Apache-SSL	Unknown	9-Aug-2002
Apple Computer Inc.	Vulnerable	9-Aug-2002
Covalent	Unknown	9-Aug-2002
Debian	Vulnerable	9-Aug-2002
Gentoo Linux	Vulnerable	9-Aug-2002
Guardian Digital	Vulnerable	9-Aug-2002
Hewlett-Packard Company	Vulnerable	9-Aug-2002
IBM	Vulnerable	9-Aug-2002
Juniper Networks	Vulnerable	16-Aug-2002
Lotus Development Corporation	Not Vulnerable	9-Aug-2002
MandrakeSoft	Vulnerable	23-Sep-2002
Microsoft Corporation	Not Vulnerable	26-Sep-2002
NCSA	Unknown	9-Aug-2002
NetBSD	Vulnerable	23-Sep-2002
OpenLDAP	Vulnerable	9-Aug-2002
OpenPKG	Vulnerable	9-Aug-2002
OpenSSL	Vulnerable	30-Jul-2002
Oracle	Vulnerable	9-Aug-2002
Red Hat Inc.	Vulnerable	9-Aug-2002
Secure Computing Corporation	Vulnerable	30-Sep-2002
SuSE	Vulnerable	23-Sep-2002
Trustix	Vulnerable	9-Aug-2002

References

http://www.kb.cert.org/vuls/id/102795
http://www.kb.cert.org/vuls/id/258555
http://www.kb.cert.org/vuls/id/308891
http://www.kb.cert.org/vuls/id/748355
http://www.securityfocus.com/bid/5361
http://www.securityfocus.com/bid/5353

Credit

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

This document was written by Jason A Rafail.

Other Information

Date Public	07/30/2002
Date First Published	07/30/2002 10:13:17 AM
Date Last Updated	09/30/2002
CERT Advisory	CA-2002-23
CVE Name	CAN-2002-0657
US-CERT Technical Alerts
Metric	5.88
Document Revision	27

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