Rapid7 Vulnerability & Exploit Database

CESA-2005:476: openssl security update

Free InsightVM Trial No credit card necessary
Watch Demo See how it all works
Back to Search

CESA-2005:476: openssl security update



Updated OpenSSL packages that fix security issues are now available. This update has been rated as having moderate security impact by the Red Hat Security Response Team.

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. Colin Percival reported a cache timing attack that could allow a malicious local user to gain portions of cryptographic keys. The Common Vulnerabilities and Exposures project (cve.mitre.org) assigned the name CAN-2005-0109 to the issue. The OpenSSL library has been patched to add a new fixed-window mod_exp implementation as default for RSA, DSA, and DH private-key operations. This patch is designed to mitigate cache timing and potentially related attacks. A flaw was found in the way the der_chop script creates temporary files. It is possible that a malicious local user could cause der_chop to overwrite files (CAN-2004-0975). The der_chop script was deprecated and has been removed from these updated packages. CentOS Linux 4 did not ship der_chop and is therefore not vulnerable to this issue. Users are advised to update to these erratum packages which contain patches to correct these issues. Please note: After installing this update, users are advised to either restart all services that use OpenSSL or restart their system.


  • centos-upgrade-openssl
  • centos-upgrade-openssl-devel
  • centos-upgrade-openssl-perl
  • centos-upgrade-openssl095a
  • centos-upgrade-openssl096
  • centos-upgrade-openssl096b

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center