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OpenSSL FIPS Object Module fails to properly generate random seeds

Vulnerability Note VU#150249

Original Release Date: 2008-01-03 | Last Revised: 2008-01-03

Overview

The OpenSSL FIPS Module fails to perform auto-seeding, which may allow an attacker to predict pseudo-randomly generated data.

Description

OpenSSL is a toolkit that provides SSL and TLS protocols as well as a general purpose cryptography library. The OpenSSL FIPS Object Module provides an API for invoking FIPS-approved cryptographic functions. The OpenSSL FIPS Module fails to properly perform auto-seeding during the FIPS self-test. This causes the PRNG key and seed to correspond to the last self-test. The FIPS PRNG gets additional seed data from the date-time information only.

Impact

An attacker may be able to predict pseudo-randomly generated data from OpenSSL. This can weaken the protection provided by OpenSSL's cryptography.

Solution

Wait for an approved patched distribution

This vulnerability is described in OpenSSL Security Advisory [29-Nov-2007]. This advisory describes the patches that demonstrate two different fixes for the vulnerability. However, FIPS 140-2 validation must be performed before the fixes can be incorporated into a validated module.

Vendor Information

150249
 
Affected   Unknown   Unaffected

OpenSSL

Updated:  January 03, 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

Wait for an approved patched distribution

This vulnerability is described in OpenSSL Security Advisory [29-Nov-2007]. This advisory describes the patches that demonstrate two different fixes for the vulnerability. However, FIPS 140-2 validation must be performed before the fixes can be incorporated into a validated module.

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

Acknowledgements

This vulnerability was reported by Geoff Lowe of Secure Computing Corporation.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2007-5502
Severity Metric: 0.50
Date Public: 2007-11-30
Date First Published: 2008-01-03
Date Last Updated: 2008-01-03 16:27 UTC
Document Revision: 5

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