CVE-2011-4815

Home/CVE/Ruby (aka CRuby) before 1.8.7-p357 computes hash values without restricting the ability to trigger hash collisions predi

CVE

Ruby (aka CRuby) before 1.8.7-p357 computes hash values without restricting the ability to trigger hash collisions predi

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.

HIGH · CVSS 7.8 EPSS 0.00946

Schedule remediation

CVSS base score ≥ 7.0

Sigma rules3 YARA rules0

⬡

Weakness Classification

CWE-20Improper Input Validation

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Affected Products & Versions

ruby-lang ruby<= 1.8.7-p352

ruby-lang rubyall versions

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Sigma Hunt Rules

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

productmediumRuby on Rails Framework Exceptions

productmediumPotential Ruby Reverse Shell

productmediumRuby Inline Command Execution

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Scoring & Timeline

7.8

HIGH · CVSS v2 (legacy) · cve@mitre.org

View on NVD

This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.

v2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Published to NVD30 Dec 2011 · 01:55 AM

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Vendor Advisories

rhsaRHSA-2026:7307Moderate
rhsaRHSA-2026:8838Moderate
rhsaRHSA-2026:7305Moderate
rhsaRHSA-2013:0582Moderate
usnUSN-1377-1
Show all 7 vendor advisoriesrhsaRHSA-2012:0070Moderate
rhsaRHSA-2012:0069Moderate

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

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

Show all 16 references

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/903934US 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

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