Vulnerability CVE-2012-5370
Published: 2012-11-28

Description:
JRuby 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 the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4838.

Type:

CWE-310

 (Cryptographic Issues)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Jruby -> Jruby 

 References:
https://www.131002.net/data/talks/appsec12_slides.pdf
https://bugzilla.redhat.com/show_bug.cgi?id=880671
http://www.ocert.org/advisories/ocert-2012-001.html
http://rhn.redhat.com/errata/RHSA-2013-0533.html
http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf
http://2012.appsec-forum.ch/conferences/#c17
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