USN-1583-1: Ruby vulnerabilities

Releases

• Ubuntu 12.04

Packages

• 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 machine-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

• libruby1.9.1 - 1.9.3.0-1ubuntu2.2

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

References

• CVE-2011-1005
• CVE-2012-2125
• CVE-2012-2126

Related notices

• USN-1377-1
• USN-1582-1