Java Murmur hash denial of service

java-murmur-hash-dos (80299) The risk level is classified as MediumMedium Risk

Description:

Java is vulnerable to a denial of service, caused by an error in the Murmur hash function implementation. 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.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Apply the appropriate update for your system, See References.

References:

  • oss-security: Andrea Barisani | 27 Nov: [oCERT-2012-001] multiple implementations denial-of-service via MurmurHash algorithm collision.
  • Sun Web site: Java.
  • BID-56673: Java CVE-2012-5373 'MurmurHash' Algorithm Hash Collision Denial of Service Vulnerability
  • CVE-2012-5373: Oracle Java SE 7 and earlier, and OpenJDK 7 and earlier, 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 MurmurHash3 algorithm, a different vulnerability than CVE-2012-2739.
  • OSVDB ID: 87862: Oracle Java JDK / OpenJDK MurmurHash Implementation Hash Collision Remote DoS

Platforms Affected:

  • Sun JDK 1.7
  • Sun JDK 1.7.0_2
  • Sun JDK 1.7.0_4

Reported:

Nov 27, 2012

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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.

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