Moderate severityNVD Advisory· Published Dec 30, 2011· Updated Apr 29, 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.
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
12cpe: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:*:*:*:*:*:*:*
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
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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