Moderate severityNVD Advisory· Published Dec 30, 2011· Updated Jun 16, 2026
CVE-2011-5036
CVE-2011-5036
Description
Rack before 1.1.3, 1.2.x before 1.2.5, and 1.3.x before 1.3.6 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
rackRubyGems | < 1.1.3 | 1.1.3 |
rackRubyGems | >= 1.2.0, < 1.2.5 | 1.2.5 |
rackRubyGems | >= 1.3.0, < 1.3.6 | 1.3.6 |
org.jruby:jruby-parentMaven | < 1.6.5.1 | 1.6.5.1 |
Affected products
14cpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*+ 11 more
- cpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*range: <=1.1.0
- cpe:2.3:a:rack_project:rack:1.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.2:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.3:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.2.4:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.0:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.1:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.4:*:*:*:*:*:*:*
- cpe:2.3:a:rack_project:rack:1.3.5:*:*:*:*:*:*:*
- ghsa-coords2 versions
< 1.1.3+ 1 more
- (no CPE)range: < 1.1.3
- (no CPE)range: < 1.6.5.1
Patches
Vulnerability mechanics
References
11- gist.github.com/52bbc6b9cc19ce330829nvdExploitWEB
- github.com/advisories/GHSA-v6j3-7jrw-hq2pghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2011-5036ghsaADVISORY
- www.debian.org/security/2013/dsa-2783nvdWEB
- www.kb.cert.org/vuls/id/903934nvdUS Government ResourceWEB
- www.nruns.com/_downloads/advisory28122011.pdfnvdWEB
- www.ocert.org/advisories/ocert-2011-003.htmlnvdWEB
- github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2011-5036.ymlghsaWEB
- web.archive.org/web/20120201040317/http://jruby.org/2011/12/27/jruby-1-6-5-1ghsaWEB
- web.archive.org/web/20130213132312/http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.htmlghsaWEB
- archives.neohapsis.com/archives/bugtraq/2011-12/0181.htmlnvd
News mentions
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