What’s Vulnerable › Vulnerabilities

CVE-2012-6051

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-11-28 · updated 2026-06-16
• Weakness: CWE-310

Description

Google CityHash 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.

Affected products

• Google Cityhash: all versions

References

• http://2012.appsec-forum.ch/conferences/#c17
• http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
• http://code.google.com/p/cityhash/source/browse/trunk/NEWS
• https://www.131002.net/data/talks/appsec12_slides.pdf
• http://2012.appsec-forum.ch/conferences/#c17
• http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
• http://code.google.com/p/cityhash/source/browse/trunk/NEWS
• https://www.131002.net/data/talks/appsec12_slides.pdf

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