CVE-2011-2686

Publication date 5 August 2011

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

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.

Read the notes from the security team

Status

No maintained releases are affected by this CVE.

Package Ubuntu Release Status
ruby1.8 11.10 oneiric
Not affected
11.04 natty
Fixed 1.8.7.302-2ubuntu0.1
10.10 maverick
Fixed 1.8.7.299-2ubuntu0.1
10.04 LTS lucid
Fixed 1.8.7.249-2ubuntu0.1
8.04 LTS hardy Ignored end of life

Notes

jdstrand

ruby1.8 only

tyhicks

Simple test case in upstream bug’s description

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
ruby1.8

References

Related Ubuntu Security Notices (USN)

    • USN-1377-1
    • Ruby vulnerabilities
    • 28 February 2012

Other references