Synopsis: Moderate: ruby security update Issue Date: 2011-06-28 CVE Numbers: CVE-2009-4492 CVE-2010-0541 CVE-2011-1005 CVE-2011-0188 Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. A flaw was found in the way large amounts of memory were allocated on 64-bit systems when using the BigDecimal class. A context-dependent attacker could use this flaw to cause memory corruption, causing a Ruby application that uses the BigDecimal class to crash or, possibly, execute arbitrary code. This issue did not affect 32-bit systems. (CVE-2011-0188) It was found that WEBrick (the Ruby HTTP server toolkit) did not filter terminal escape sequences from its log files. A remote attacker could use specially-crafted HTTP requests to inject terminal escape sequences into the WEBrick log files. If a victim viewed the log files with a terminal emulator, it could result in control characters being executed with the privileges of that user. (CVE-2009-4492) A cross-site scripting (XSS) flaw was found in the way WEBrick displayed error pages. A remote attacker could use this flaw to perform a cross-site scripting attack against victims by tricking them into visiting a specially-crafted URL. (CVE-2010-0541) A flaw was found in the method for translating an exception message into a string in the Exception class. A remote attacker could use this flaw to bypass safe level 4 restrictions, allowing untrusted (tainted) code to modify arbitrary, trusted (untainted) strings, which safe level 4 restrictions would otherwise prevent. (CVE-2011-1005) All Ruby users should upgrade to these updated packages, which contain backported patches to resolve these issues. SL4: i386 irb-1.8.1-16.el4.i386.rpm ruby-tcltk-1.8.1-16.el4.i386.rpm ruby-mode-1.8.1-16.el4.i386.rpm ruby-libs-1.8.1-16.el4.i386.rpm ruby-docs-1.8.1-16.el4.i386.rpm ruby-devel-1.8.1-16.el4.i386.rpm ruby-1.8.1-16.el4.i386.rpm x86_64 ruby-mode-1.8.1-16.el4.x86_64.rpm ruby-libs-1.8.1-16.el4.x86_64.rpm ruby-libs-1.8.1-16.el4.i386.rpm ruby-docs-1.8.1-16.el4.x86_64.rpm ruby-devel-1.8.1-16.el4.x86_64.rpm ruby-1.8.1-16.el4.x86_64.rpm irb-1.8.1-16.el4.x86_64.rpm ruby-tcltk-1.8.1-16.el4.x86_64.rpm - Scientific Linux Development Team