Bug 169863

Summary: CAN-2005-2969 Potential SSL 2.0 Rollback
Product: Red Hat Enterprise Linux 4 Reporter: Josh Bressers <bressers>
Component: opensslAssignee: Tomas Mraz <tmraz>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 4.0CC: security-response-team
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: impact=moderate,source=openssl,public=20051011,reported=20051004
Fixed In Version: RHSA-2005-800 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-10-11 15:34:45 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Josh Bressers 2005-10-04 15:38:15 UTC 
This text comes from the openssl advisory:

A vulnerability has been found in all previously released versions of
OpenSSL (all versions up to 0.9.7g, and version 0.9.8).
Versions 0.9.7h and 0.9.8a are being released to address the issue.
The vulnerability potentially affects applications that use the
SSL/TLS server implementation provided by OpenSSL.

Such applications are affected if they use the option
SSL_OP_MSIE_SSLV2_RSA_PADDING.  This option is implied by use of
SSL_OP_ALL, which is intended to work around various bugs in
third-party software that might prevent interoperability.  The
SSL_OP_MSIE_SSLV2_RSA_PADDING option disables a verification step in
the SSL 2.0 server supposed to prevent active protocol-version
rollback attacks.  With this verification step disabled, an attacker
acting as a "man in the middle" can force a client and a server to
negotiate the SSL 2.0 protocol even if these parties both support SSL
3.0 or TLS 1.0.  The SSL 2.0 protocol is known to have severe
cryptographic weaknesses and is supported as a fallback only.

Applications using neither SSL_OP_MSIE_SSLV2_RSA_PADDING nor
SSL_OP_ALL are not affected.  Also, applications that disable
use of SSL 2.0 are not affected.
Comment 1 Josh Bressers 2005-10-04 15:39:28 UTC 
This issue also affects RHEL2.1 and RHEL3
Comment 5 Josh Bressers 2005-10-11 12:09:15 UTC 
Lifting embargo
Comment 6 Red Hat Bugzilla 2005-10-11 15:34:45 UTC 
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-800.html