Bug 169864 - CAN-2005-2969 Potential SSL 2.0 Rollback
Summary: CAN-2005-2969 Potential SSL 2.0 Rollback
Alias: None
Product: Fedora
Classification: Fedora
Component: openssl   
(Show other bugs)
Version: 4
Hardware: All Linux
Target Milestone: ---
Assignee: Tomas Mraz
QA Contact: Brian Brock
Whiteboard: impact=moderate,source=openssl,public...
Keywords: Security
Depends On:
TreeView+ depends on / blocked
Reported: 2005-10-04 15:41 UTC by Josh Bressers
Modified: 2007-11-30 22:11 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-10-14 06:56:23 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Josh Bressers 2005-10-04 15:41:38 UTC
+++ This bug was initially created as a clone of Bug #169863 +++

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 15:42:49 UTC
This issue also affects FC3

Comment 2 Josh Bressers 2005-10-11 12:12:57 UTC
Lifting embargo

Comment 3 Fedora Update System 2005-10-14 03:49:50 UTC
From User-Agent: XML-RPC

openssl097a-0.9.7a-3.1 openssl-0.9.7f-7.10 has been pushed for FC4, which should resolve this issue.  If these problems are still present in this version, then please make note of it in this bug report.

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