openssl, openssl096b security update

CentOS Errata and Security Advisory CESA-2005:800

OpenSSL is a toolkit that implements Secure Sockets Layer (SSL v2/v3) and
Transport Layer Security (TLS v1) protocols as well as a full-strength
general purpose cryptography library.

OpenSSL contained a software work-around for a bug in SSL handling in
Microsoft Internet Explorer version 3.0.2. This work-around is enabled in
most servers that use OpenSSL to provide support for SSL and TLS. Yutaka
Oiwa discovered that this work-around could allow an attacker, acting as a
“man in the middle” to force an SSL connection to use SSL 2.0 rather than a
stronger protocol such as SSL 3.0 or TLS 1.0. The Common Vulnerabilities
and Exposures project (cve.mitre.org) has assigned the name CAN-2005-2969
to this issue.

A bug was also fixed in the way OpenSSL creates DSA signatures. A cache
timing attack was fixed in RHSA-2005-476 which caused OpenSSL to do private
key calculations with a fixed time window. The DSA fix for this was not
complete and the calculations are not always performed within a
fixed-window. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2005-0109 to this issue.

Users are advised to upgrade to these updated packages, which remove the
MISE 3.0.2 work-around and contain patches to correct these issues.

Note: After installing this update, users are advised to either
restart all services that use OpenSSL or restart their system.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2005-October/074425.html
https://lists.centos.org/pipermail/centos-announce/2005-October/074428.html
https://lists.centos.org/pipermail/centos-announce/2005-October/074435.html
https://lists.centos.org/pipermail/centos-announce/2005-October/074436.html
https://lists.centos.org/pipermail/centos-announce/2005-October/074440.html
https://lists.centos.org/pipermail/centos-announce/2005-October/074447.html

Affected packages:
openssl
openssl-devel
openssl-perl
openssl096b

Upstream details at:
https://access.redhat.com/errata/RHSA-2005:800