CVE-2012-5371

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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 4.09% Top 15%
Vendor Advisory ubuntu.com Vendor Advisory ruby-lang.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
http://securitytracker.com/id?1027747 vdb entry patch
http://www.osvdb.org/87280 vdb entry
http://www.securityfocus.com/bid/56484 vdb entry
https://www.131002.net/data/talks/appsec12_slides.pdf
http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/ patch vendor advisory
http://2012.appsec-forum.ch/conferences/#c17
https://bugzilla.redhat.com/show_bug.cgi?id=875236 patch
http://secunia.com/advisories/51253 third party advisory
http://www.ocert.org/advisories/ocert-2012-001.html
http://www.ubuntu.com/usn/USN-1733-1 vendor advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/79993 vdb entry

Frequently Asked Questions

What is the severity of CVE-2012-5371?
CVE-2012-5371 has been scored as a medium severity vulnerability.
How to fix CVE-2012-5371?
To fix CVE-2012-5371, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-5371 being actively exploited in the wild?
It is possible that CVE-2012-5371 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~4% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.