USN-1582-1: RubyGems vulnerabilities

Ubuntu Security Notice USN-1582-1

25th September, 2012

rubygems vulnerabilities

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

  • Ubuntu 12.04 LTS

Summary

RubyGems could be made to download and install malicious gem files.

Software description

  • rubygems - package management framework for Ruby libraries/applications

Details

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 version:

Ubuntu 12.04 LTS:
rubygems 1.8.15-1ubuntu0.1

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2012-2125, CVE-2012-2126