CVE-2012-5370: JRuby denial of service via Hash Collision

May 17, 2022 (updated August 29, 2023)

JRuby computes hash values without properly 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, as demonstrated by a universal multicollision attack against the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4838.

References

jruby.org/2012/12/03/jruby-1-7-1
rhn.redhat.com/errata/RHSA-2013-0533.html
bugzilla.redhat.com/show_bug.cgi?id=880671
github.com/advisories/GHSA-fmmq-j7pq-f85c
github.com/jruby/jruby/commit/5e4aab28b26fd127112b76fabfac9a33b64caf77
nvd.nist.gov/vuln/detail/CVE-2012-5370

Code Behaviors & Features

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