Exploit the possiblities

Ubuntu Security Notice USN-1582-1

Ubuntu Security Notice USN-1582-1
Posted Sep 26, 2012
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1582-1 - 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. 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. Various other issues were also addressed.

tags | advisory, remote, web
systems | linux, ubuntu
advisories | CVE-2012-2126, CVE-2012-2125, CVE-2012-2125, CVE-2012-2126
MD5 | 0de9fe3c27307b40846effef8b8577ea

Ubuntu Security Notice USN-1582-1

Change Mirror Download
Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-1582-1
September 26, 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 versions:

Ubuntu 12.04 LTS:
rubygems 1.8.15-1ubuntu0.1

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

References:
http://www.ubuntu.com/usn/usn-1582-1
CVE-2012-2125, CVE-2012-2126

Package Information:
https://launchpad.net/ubuntu/+source/rubygems/1.8.15-1ubuntu0.1

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