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OpenSSL TLS handshake Denial of Service

Vulnerability Note VU#520586

Original Release Date: 2008-05-30 | Last Revised: 2008-05-30

Overview

A vulnerability exists in OpenSSL that may allow a remote attacker to cause a denial of service.

Description

OpenSSL contains a vulnerability in the way specially crafted TLS handshake packets are handled that may result in a denial of service. According to OpenSSL Security Advisory [28-Mar-2008]:

... if the 'Server Key exchange message' is omitted from a TLS handshake in OpenSSL 0.9.8f and OpenSSL 0.9.8g. If a client connects to a malicious server with particular cipher suites, the server could cause the client to crash.

Note that this issue may affect OpenSSL versions prior to 0.9.8h.

Impact

A remote, unauthorized attacker may be able to cause a denial of service.

Solution

Upgrade or Apply Patch
OpenSSL has issued an upgrade and a patch to address this issue. See OpenSSL Security Advisory [28-Mar-2008] for more information. OpenSSL is included in various Linux and UNIX distributions. Please consult the relevant documentation of your distribution to obtain the appropriate updates.

Vendor Information

520586
 
Affected   Unknown   Unaffected

OpenSSL

Updated:  May 30, 2008

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

OpenSSL has issued an upgrade and a patch to address this issue. See OpenSSL Security Advisory [28-Mar-2008] for more information.

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

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

References

Credit

This issue was reported in OpenSSL Security Advisory [28-Mar-2008] . OpenSSL credits Codenomicon for reporting these issues.

This document was written by Chris Taschner.

Other Information

CVE IDs: CVE-2008-1672
Severity Metric: 14.70
Date Public: 2008-05-28
Date First Published: 2008-05-30
Date Last Updated: 2008-05-30 17:37 UTC
Document Revision: 8

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