JRuby: Denial of Service

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
dev-java/jruby	< 1.6.5.1	>= 1.6.5.1	All supported architectures

Related bugreports: #396305

A hash collision vulnerability in JRuby allows remote attackers to cause a Denial of Service condition.

2. Impact Information

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.

3. Resolution Information

There is no known workaround at this time.

All JRuby users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-java/jruby-1.6.5.1"

4. References

Page updated July 09, 2012

Summary: This is a Gentoo Linux Security Advisory

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