Scientific Linux 4: CVE-2009-4492 Moderate: Ruby Memory Corruption

Date: Wed, 29 Jun 2011 14:52:09 -0500
Reply-To: Troy Dawson 
Sender: Security Errata for Scientific Linux
 
From: Troy Dawson 
Subject: Security ERRATA Moderate: ruby on SL4.x i386/x86_64
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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
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