Ruby 1.9.3 before patchlevel 286 and 2.0 before revision r37068...

Vulnerability Description

Ruby 1.9.3 before patchlevel 286 and 2.0 before revision r37068 allows context-dependent attackers to bypass safe-level restrictions and modify untainted strings via the (1) exc_to_s or (2) name_err_to_s API function, which marks the string as tainted, a different vulnerability than CVE-2012-4466. NOTE: this issue might exist because of a CVE-2011-1005 regression.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=862598
• http://www.openwall.com/lists/oss-security/2012/10/02/4
• http://www.openwall.com/lists/oss-security/2012/10/03/9
• http://lists.fedoraproject.org/pipermail/package-announce/2012-October/089554.html
• http://lists.fedoraproject.org/pipermail/package-announce/2012-October/089887.html
• http://www.ruby-lang.org/en/news/2012/10/12/cve-2012-4464-cve-2012-4466/
• http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=37068