JRuby hash denial of service
|jruby-hash-dos (72019)||Medium Risk|
JRuby is vulnerable to a denial of service, caused by insufficient randomization of hash data structures. By sending multiple specially-crafted HTTP POST requests to an affected application containing conflicting hash key values, a remote attacker could exploit this vulnerability to cause the consumption of CPU resources.
Denial of Service
Upgrade to the latest version of JRuby (126.96.36.199 or later), available from the JRuby Web site. See References.
For other distributions:
Apply the appropriate update for your system. See References.
- Check Point Web Site: Check Point Multiple Products Hash Collision Denial of Service Vulnerability.
- JRuby Web site: The Ruby Programming Language on the JVM.
- n.runs-SA-2011.004 : Denial of Service through hash table multi-collisions.
- oCERT-2011-003: multiple implementations denial-of-service via hash algorithm collision.
- BID-51233: JRuby Hash Collision Denial Of Service Vulnerability
- BID-51236: Java Hash Collision Denial Of Service Vulnerability
- CVE-2011-4838: JRuby before 188.8.131.52 computes hash values without 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.
- OSVDB ID: 78116: JRuby Hash Collision Form Parameter Parsing Remote DoS
- SA47407: JRuby Web Form Hash Collision Denial of Service Vulnerability
- SA48662: Check Point Multiple Products Hash Collision Denial of Service Vulnerability
- US-CERT VU#903934: Hash table implementations vulnerable to algorithmic complexity attacks
- Check Point Connectra
- Check Point Connectra Appliances
- Check Point Endpoint Security 7.0
- Check Point Endpoint Security 8.0
- Check Point Integrity 5.0
- Check Point Integrity 6.0
- Check Point Integrity 7.0
- Check Point Security Gateways
- JRuby JRuby 1.5.6
Dec 28, 2011
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.