Description

Ruby (aka CRuby) before 1.8.7-p357 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

References

http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/391606

http://jvn.jp/en/jp/JVN90615481/index.html

http://jvndb.jvn.jp/ja/contents/2012/JVNDB-2012-000066.html

http://lists.apple.com/archives/security-announce/2012/May/msg00001.html

http://rhn.redhat.com/errata/RHSA-2012-0069.html

http://rhn.redhat.com/errata/RHSA-2012-0070.html

http://secunia.com/advisories/47405

http://secunia.com/advisories/47822

http://support.apple.com/kb/HT5281

http://www.kb.cert.org/vuls/id/903934

http://www.nruns.com/_downloads/advisory28122011.pdf

http://www.ocert.org/advisories/ocert-2011-003.html

http://www.ruby-lang.org/en/news/2011/12/28/denial-of-service-attack-was-found-for-rubys-hash-algorithm/

http://www.securitytracker.com/id?1026474

https://exchange.xforce.ibmcloud.com/vulnerabilities/72020

Details

Risk Information

CVSS v2