SB2012112804 - Cryptographic issues in Google, cityhash

Description

This security bulletin contains information about 1 vulnerability.

1) Cryptographic issues (CVE-ID: CVE-2012-6051)

CWE-ID: CWE-310 - Cryptographic Issues

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

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.

Remediation

Install update from vendor's website.

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