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CVE-2011-2686

Published: 5 August 2011

Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900. NOTE: this issue exists because of a regression during Ruby 1.8.6 development.

Notes

AuthorNote
jdstrand
ruby1.8 only
tyhicks
Simple test case in upstream bug's description

Priority

Medium

Status

Package Release Status
ruby1.8
Launchpad, Ubuntu, Debian
hardy Ignored
(end of life)
lucid
Released (1.8.7.249-2ubuntu0.1)
maverick
Released (1.8.7.299-2ubuntu0.1)
natty
Released (1.8.7.302-2ubuntu0.1)
oneiric Not vulnerable
(1.8.7.352-2)
upstream
Released (1.8.7.352-2)
Patches:
upstream: http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=31713