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=========================================================== Ubuntu Security Notice USN-273-1 April 24, 2006 ruby1.8 vulnerability CVE-2006-1931 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 4.10 (Warty Warthog) Ubuntu 5.04 (Hoary Hedgehog) Ubuntu 5.10 (Breezy Badger) The following packages are affected: libruby1.8 libwebrick-ruby1.8 The problem can be corrected by upgrading the affected package to version 1.8.1+1.8.2pre2-3ubuntu0.4 (for Ubutu 4.10), 1.8.1+1.8.2pre4-1ubuntu0.3 (for Ubuntu 5.04), or 1.8.2-9ubuntu1.1 (for Ubuntu 5.10). In general, a standard system upgrade is sufficient to effect the necessary changes. Details follow: Yukihiro Matsumoto reported that Ruby's HTTP module uses blocking sockets. By sending large amounts of data to a server application that uses this module, a remote attacker could exploit this to render this application unusable and not respond any more to other clients (Denial of Service).