Several vulnerabilities have been discovered in Ruby. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2009-0642 The return value from the OCSP_basic_verify function was not checked properly, allowing continued use of a revoked certificate. CVE-2009-1904 An issue in parsing BigDecimal numbers can result in a denial-of-service condition . The following matrix identifies fixed versions: ruby1.8 ruby1.9 oldstable 1.8.5-4etch5 1.9.0+20060609-1etch5 stable 1.8.7.72-3lenny1 1.9.0.2-9lenny1 unstable 1.8.7.173-1 We recommend that you upgrade your Ruby packages.