Ubuntu alert USN-1583-1 (ruby1.9.1)

From:
    	     
 
Tyler Hicks <tyhicks@canonical.com> 
To:
    	     
 
ubuntu-security-announce@lists.ubuntu.com 
Subject:
    	     
 
[USN-1583-1] Ruby vulnerabilities 
Date:
    	     
 
Tue, 25 Sep 2012 19:33:16 -0700
Message-ID:
    	     
 
<20120926023316.GD4742@boyd>

==========================================================================
Ubuntu Security Notice USN-1583-1
September 26, 2012

ruby1.9.1 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in ruby1.9.1

Software Description:
- ruby1.9.1: Interpreter of object-oriented scripting language Ruby

Details:

It was discovered that Ruby incorrectly allowed untainted strings to be
modified in protective safe levels. An attacker could use this flaw to bypass
intended access restrictions. (CVE-2011-1005)

John Firebaugh discovered that the RubyGems remote gem fetcher did not properly
verify SSL certificates. A remote attacker could exploit this to perform a man
in the middle attack to alter gem files being downloaded for installation.
(CVE-2012-2126)

John Firebaugh discovered that the RubyGems remote gem fetcher allowed
redirection from HTTPS to HTTP. A remote attacker could exploit this to perform
a man in the middle attack to alter gem files being downloaded for
installation. (CVE-2012-2125)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
  libruby1.9.1                    1.9.3.0-1ubuntu2.2

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1583-1
  CVE-2011-1005, CVE-2012-2125, CVE-2012-2126

Package Information:
  https://launchpad.net/ubuntu/+source/ruby1.9.1/1.9.3.0-1u...

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