Rack Gem Subject to Denial of Service via Hash Collisions
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.jruby:jruby-parent | < 1.6.5.1 | 1.6.5.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2011-5036
- https://gist.github.com/52bbc6b9cc19ce330829
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2011-5036.yml
- https://web.archive.org/web/20120201040317/http://jruby.org/2011/12/27/jruby-1-6-5-1
- https://web.archive.org/web/20130213132312/http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html
- http://www.debian.org/security/2013/dsa-2783
- http://www.kb.cert.org/vuls/id/903934
- http://www.nruns.com/_downloads/advisory28122011.pdf
- http://www.ocert.org/advisories/ocert-2011-003.html
- Weakness (CWE)
CWE-328, CWE-400- Platform
- Java / Kotlin (Maven)
- Package
org.jruby:jruby-parent- Disclosed
- 17.05.2022
- Updated
- 11.10.2026 12:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v6j3-7jrw-hq2p - CC BY 4.0
Vulnerability history: org.jruby:jruby-parent
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 05.2022 05.2022
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2022: 2
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 0
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Rack Gem Subject to Denial of Service via Hash Collisions this entry
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