Lawrence Pit discovered that Ruby on Rails, a web development framenwork,
is vulnerable to a flaw in the parsing of JSON to YAML. Using a specially
crafted payload attackers can trick the backend into decoding a subset of
The vulnerability has been addressed by removing the YAML backend and
adding the OkJson backend.
For the stable distribution (squeeze), this problem has been fixed in
For the testing distribution (wheezy), this problem will be fixed soon.
For the unstable distribution (sid), this problem has been fixed in
version 2.3.14-6 of the ruby-activesupport-2.3 package.
The 3.2 version of rails as found in Debian wheezy and sid is not
affected by the problem.
We recommend that you upgrade your rails packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: [email protected]
Debian Security Advisory DSA-2613-1 [email protected]
https://www.debian.org/security/ Thijs Kinkhorst
January 29, 2013 https://www.debian.org/security/faq
Vulnerability : insufficient input validation
Problem type : remote