A hash collision vulnerability in JRuby allows remote attackers to cause a Denial of Service condition.
| Package | dev-java/jruby on all architectures | 
|---|---|
| Affected versions | < 1.6.5.1 | 
| Unaffected versions | >= 1.6.5.1 | 
JRuby is a Java-based Ruby interpreter implementation.
JRuby does not properly randomize hash functions to protect against hash collision attacks.
A remote attacker could send a specially crafted input, possibly resulting in a Denial of Service condition.
There is no known workaround at this time.
All JRuby users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-java/jruby-1.6.5.1"
      Release date
      
      July 09, 2012
    
      Latest revision
      
      July 09, 2012: 1
    
      Severity
      
      normal
    
      Exploitable
      
      remote
    
Bugzilla entries