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CVE-2012-5371

22
FAUCET Score

CVE-2012-5371 describes a denial-of-service vulnerability in Ruby 1.9 before 1.9.3-p327 and 2.0 before r37575. This flaw allows attackers to cause high CPU consumption by exploiting predictable hash collisions in applications that use hash tables, impacting the availability of affected Ruby applications. With a CVSS score of 5.0, this vulnerability is network-exploitable with low attack complexity and no authentication required, leading to a partial availability impact. There is no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.9.3CPE matchmatch criteria
cpe:2.3:a:ruby-lang:ruby:*:p286:*:*:*:*:*:*
1.9CPE matchmatch criteria
cpe:2.3:a:ruby-lang:ruby:1.9:*:*:*:*:*:*:*
1.9.1CPE matchmatch criteria
cpe:2.3:a:ruby-lang:ruby:1.9.1:*:*:*:*:*:*:*
1.9.2CPE matchmatch criteria
cpe:2.3:a:ruby-lang:ruby:1.9.2:*:*:*:*:*:*:*
1.9.3CPE matchmatch criteria
cpe:2.3:a:ruby-lang:ruby:1.9.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.36%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0336 is in the 83rd percentile among its peer group of 23,701 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (36)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: graphviz-0:2.26.0-10.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-console-0:0.0.16-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-broker-0:1.0.11-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-broker-util-0:1.0.15-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-cron-1.4-0:1.0.3-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-diy-0.1-0:1.0.3-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-haproxy-1.4-0:1.0.4-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-jbosseap-6.0-0:1.0.4-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-jbossews-1.0-0:1.0.13-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-jenkins-1.4-0:1.0.2-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-jenkins-client-1.4-0:1.0.2-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-mysql-5.1-0:1.0.5-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-perl-5.10-0:1.0.3-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-php-5.3-0:1.0.5-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-postgresql-8.4-0:1.0.3-2.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-ruby-1.8-0:1.0.7-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-cartridge-ruby-1.9-scl-0:1.0.8-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: openshift-origin-msg-node-mcollective-0:1.0.3-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: php-0:5.3.3-22.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: ruby193-ruby-0:1.9.3.327-25.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: ruby193-rubygem-actionpack-1:3.2.8-3.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: ruby193-rubygem-activemodel-0:3.2.8-2.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: ruby193-rubygem-activerecord-1:3.2.8-3.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: ruby193-rubygem-railties-0:3.2.8-2.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: ruby193-rubygem-ruby_parser-0:2.3.1-3.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-actionpack-1:3.0.13-4.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-activemodel-0:3.0.13-3.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-activerecord-1:3.0.13-5.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-bson-0:1.8.1-2.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-mongo-0:1.8.1-2.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-openshift-origin-auth-remote-user-0:1.0.5-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-openshift-origin-console-0:1.0.10-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-openshift-origin-controller-0:1.0.12-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-openshift-origin-node-0:1.0.11-1.el6op
View patch
redhatpatch availablevia redhat_api
Product: RHEL 6 Version of OpenShift EnterpriseFixed in: rubygem-ruby_parser-0:2.0.4-6.el6op
View patch

Vendor Advisories (1)

redhatCVE-2012-5371Moderate

ruby: Murmur hash-flooding DoS flaw in ruby 1.9 (oCERT-2012-001)

Nov 9, 2012

References

2012.appsec-forum.ch / conferences
asfws12.files.wordpress.com / 2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/51253
securitytracker.com / id
Patch
exchange.xforce.ibmcloud.com / vulnerabilities/79993
131002.net / data/talks/appsec12_slides.pdf
ocert.org / advisories/ocert-2012-001.html
osvdb.org / 87280
ruby-lang.org / en/news/2012/11/09/ruby19-hashdos-cve-2012-5371
PatchVendor Advisory
securityfocus.com / bid/56484
ubuntu.com / usn/USN-1733-1