CVE-2011-4815
HIGH · CVSS 7.8EPSS 4.1%EU EUVD
Ruby (aka CRuby) before 1.8.7-p357 computes hash values without 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.
Key facts
- CVSS score
- 7.8 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:C- Weakness (CWE)
- CWE-20
- EPSS score
- 4.1% (91th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-4733)
- Published
- December 30, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-4733 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- ruby-lang / ruby
- ruby-lang / ruby
- ruby-lang / ruby
- ruby-lang / ruby
- ruby-lang / ruby
References
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
- http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/391606
- http://jvn.jp/en/jp/JVN90615481/index.html
- http://jvndb.jvn.jp/ja/contents/2012/JVNDB-2012-000066.html
- http://lists.apple.com/archives/security-announce/2012/May/msg00001.html
- http://rhn.redhat.com/errata/RHSA-2012-0069.html
- http://rhn.redhat.com/errata/RHSA-2012-0070.html
- http://secunia.com/advisories/47405
- http://secunia.com/advisories/47822
- http://support.apple.com/kb/HT5281
- http://www.kb.cert.org/vuls/id/903934(US Government Resource)
- http://www.nruns.com/_downloads/advisory28122011.pdf
- http://www.ocert.org/advisories/ocert-2011-003.html
- http://www.ruby-lang.org/en/news/2011/12/28/denial-of-service-attack-was-found-for-rubys-hash-algorithm/
- http://www.securitytracker.com/id?1026474
- https://exchange.xforce.ibmcloud.com/vulnerabilities/72020
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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