ruby: Murmur hash-flooding DoS flaw in ruby 1.9 (oCERT-2012-001)
Published Nov 28, 2012
5.0
MEDIUMCVSS 2.0
EPSS 3.33%
Description
Ruby (aka CRuby) 1.9 before 1.9.3-p327 and 2.0 before r37575 computes hash values without properly 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, as demonstrated by a universal multicollision attack against a variant of the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4815.
Affected products
No data.
- ≤ 1.9.3
- 1.9
- 1.9.1
- 1.9.2
- 1.9.3
- 1.9.3
- 1.9.3
- 1.9.3
- 2.0
No data.
RHEL 6 Version of OpenShift Enterprise
graphviz-0:2.26.0-10.el6
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-console-0:0.0.16-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-broker-0:1.0.11-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-broker-util-0:1.0.15-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-cron-1.4-0:1.0.3-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-diy-0.1-0:1.0.3-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-haproxy-1.4-0:1.0.4-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-jbosseap-6.0-0:1.0.4-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-jbossews-1.0-0:1.0.13-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-jenkins-1.4-0:1.0.2-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-jenkins-client-1.4-0:1.0.2-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-mysql-5.1-0:1.0.5-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-perl-5.10-0:1.0.3-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-php-5.3-0:1.0.5-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-postgresql-8.4-0:1.0.3-2.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-ruby-1.8-0:1.0.7-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-cartridge-ruby-1.9-scl-0:1.0.8-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
openshift-origin-msg-node-mcollective-0:1.0.3-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
php-0:5.3.3-22.el6
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
ruby193-ruby-0:1.9.3.327-25.el6
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
ruby193-rubygem-actionpack-1:3.2.8-3.el6
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
ruby193-rubygem-activemodel-0:3.2.8-2.el6
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
ruby193-rubygem-activerecord-1:3.2.8-3.el6
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
ruby193-rubygem-railties-0:3.2.8-2.el6
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
ruby193-rubygem-ruby_parser-0:2.3.1-3.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-actionpack-1:3.0.13-4.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-activemodel-0:3.0.13-3.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-activerecord-1:3.0.13-5.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-bson-0:1.8.1-2.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-mongo-0:1.8.1-2.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-openshift-origin-auth-remote-user-0:1.0.5-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-openshift-origin-console-0:1.0.10-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-openshift-origin-controller-0:1.0.12-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-openshift-origin-node-0:1.0.11-1.el6op
Fixed · RHSA-2013:0582
RHEL 6 Version of OpenShift Enterprise
rubygem-ruby_parser-0:2.0.4-6.el6op
Fixed · RHSA-2013:0582
Red Hat Hardened Images
ruby3-3-main-3.3.10-23.1.hum1
Fixed · RHSA-2026:7305
Red Hat Hardened Images
ruby3-4-main-3.4.8-31.1.hum1
Fixed · RHSA-2026:7307
Red Hat Hardened Images
ruby4-0-main-4.0.0-33.3.hum1
Fixed · RHSA-2026:8838
Red Hat Hardened Images
ruby
Affected
| Product | Package | State | Advisory |
|---|---|---|---|
| RHEL 6 Version of OpenShift Enterprise | graphviz-0:2.26.0-10.el6 | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-console-0:0.0.16-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-broker-0:1.0.11-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-broker-util-0:1.0.15-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-cron-1.4-0:1.0.3-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-diy-0.1-0:1.0.3-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-haproxy-1.4-0:1.0.4-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-jbosseap-6.0-0:1.0.4-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-jbossews-1.0-0:1.0.13-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-jenkins-1.4-0:1.0.2-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-jenkins-client-1.4-0:1.0.2-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-mysql-5.1-0:1.0.5-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-perl-5.10-0:1.0.3-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-php-5.3-0:1.0.5-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-postgresql-8.4-0:1.0.3-2.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-ruby-1.8-0:1.0.7-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-cartridge-ruby-1.9-scl-0:1.0.8-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | openshift-origin-msg-node-mcollective-0:1.0.3-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | php-0:5.3.3-22.el6 | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | ruby193-ruby-0:1.9.3.327-25.el6 | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | ruby193-rubygem-actionpack-1:3.2.8-3.el6 | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | ruby193-rubygem-activemodel-0:3.2.8-2.el6 | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | ruby193-rubygem-activerecord-1:3.2.8-3.el6 | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | ruby193-rubygem-railties-0:3.2.8-2.el6 | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | ruby193-rubygem-ruby_parser-0:2.3.1-3.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-actionpack-1:3.0.13-4.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-activemodel-0:3.0.13-3.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-activerecord-1:3.0.13-5.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-bson-0:1.8.1-2.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-mongo-0:1.8.1-2.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-openshift-origin-auth-remote-user-0:1.0.5-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-openshift-origin-console-0:1.0.10-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-openshift-origin-controller-0:1.0.12-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-openshift-origin-node-0:1.0.11-1.el6op | Fixed | RHSA-2013:0582 |
| RHEL 6 Version of OpenShift Enterprise | rubygem-ruby_parser-0:2.0.4-6.el6op | Fixed | RHSA-2013:0582 |
| Red Hat Hardened Images | ruby3-3-main-3.3.10-23.1.hum1 | Fixed | RHSA-2026:7305 |
| Red Hat Hardened Images | ruby3-4-main-3.4.8-31.1.hum1 | Fixed | RHSA-2026:7307 |
| Red Hat Hardened Images | ruby4-0-main-4.0.0-33.3.hum1 | Fixed | RHSA-2026:8838 |
| Red Hat Hardened Images | ruby | Affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of ruby as shipped with Red Hat Enterprise Linux 5 and 6.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.33% (0.03330) | 88.22th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.36% (0.03357) | 87.10th | v5 (v2026.06.15) |
| Jun 3, 2026 | 1.48% (0.01483) | 81.34th | v4 (v2025.03.14) |
| Jun 2, 2026 | 3.47% (0.03466) | 87.75th | v4 (v2025.03.14) |
| Sep 19, 2025 | 2.19% (0.02191) | 83.80th | v4 (v2025.03.14) |
| Mar 30, 2025 | 4.09% (0.04089) | 87.50th | v4 (v2025.03.14) |
| Mar 29, 2025 | 7.55% (0.07549) | 86.09th | v4 (v2025.03.14) |
| Mar 17, 2025 | 4.09% (0.04089) | 87.81th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.57% (0.00568) | 78.57th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.57% (0.00568) | 77.14th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.57% (0.00568) | 74.44th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (15)
- http://2012.appsec-forum.ch/conferences/#c17 x_refsource_MISC
- http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf x_refsource_MISC
- http://secunia.com/advisories/51253 third-party-advisoryx_refsource_SECUNIA
- http://securitytracker.com/id?1027747 vdb-entryx_refsource_SECTRACKPatch
- http://www.ocert.org/advisories/ocert-2012-001.html x_refsource_MISC
- http://www.osvdb.org/87280 vdb-entryx_refsource_OSVDB
- http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/ x_refsource_CONFIRMPatchVendor Advisory
- http://www.securityfocus.com/bid/56484 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-1733-1 vendor-advisoryx_refsource_UBUNTU
- https://access.redhat.com/security/cve/CVE-2012-5371 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=875236 x_refsource_CONFIRMPatchIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/79993 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2012-5371
- https://www.131002.net/data/talks/appsec12_slides.pdf x_refsource_MISC
- https://www.cve.org/CVERecord?id=CVE-2012-5371
Change history (0)
No recorded changes yet.