CVE-2012-5370
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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-310
- EPSS score
- 2.2% (83th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2022-3805)
- Published
- November 28, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2022-3805 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- jruby / jruby
References
- http://2012.appsec-forum.ch/conferences/#c17
- http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
- http://rhn.redhat.com/errata/RHSA-2013-0533.html
- http://www.ocert.org/advisories/ocert-2012-001.html
- https://bugzilla.redhat.com/show_bug.cgi?id=880671
- https://www.131002.net/data/talks/appsec12_slides.pdf
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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