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=========================================================== Ubuntu Security Notice USN-596-1 March 26, 2008 ruby1.8 vulnerabilities CVE-2007-5162, CVE-2007-5770 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 6.06 LTS Ubuntu 6.10 Ubuntu 7.04 Ubuntu 7.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libopenssl-ruby1.8 1.8.4-1ubuntu1.4 libruby1.8 1.8.4-1ubuntu1.4 Ubuntu 6.10: libopenssl-ruby1.8 1.8.4-5ubuntu1.3 libruby1.8 1.8.4-5ubuntu1.3 Ubuntu 7.04: libopenssl-ruby1.8 1.8.5-4ubuntu2.1 libruby1.8 1.8.5-4ubuntu2.1 Ubuntu 7.10: libopenssl-ruby1.8 1.8.6.36-1ubuntu3.1 libruby1.8 1.8.6.36-1ubuntu3.1 In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: Chris Clark discovered that Ruby's HTTPS module did not check for commonName mismatches early enough during SSL negotiation. If a remote attacker were able to perform man-in-the-middle attacks, this flaw could be exploited to view sensitive information in HTTPS requests coming from Ruby applications. (CVE-2007-5162) It was discovered that Ruby's FTPTLS, telnets, and IMAPS modules did not check the commonName when performing SSL certificate checks. If a remote attacker were able to perform man-in-the-middle attacks, this flaw could be exploited to eavesdrop on encrypted communications from Ruby applications using these protocols. (CVE-2007-5770)