Jetty hash denial of service

jetty-hash-dos (72017) The risk level is classified as MediumMedium Risk

Description:

Jetty 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.

*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 patch for your system. See References.

References:

  • IBM Security Bulletin 1611913: Potential Denial of Service (DoS) security vulnerability in IBM Sterling External Authentication Server.
  • IBM Security Bulletin 1611925: Potential Denial of Service (DoS) security vulnerability in IBM Sterling Connect:Enterprise for UNIX.
  • IBM Security Bulletin 1611931: Potential Denial of Service (DoS) security vulnerability in IBM Sterling Secure Proxy.
  • IBM Security Bulletin 1620335: Potential security exposure when using InfoSphere BigInsights due to vulnerability in Jetty.
  • IBM Security Bulletin 1632399: Denial of service in IBM InfoSphere Data Replication Dashboard (CVE-2011-4461).
  • Jetty Web site: Jetty.
  • 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-51199: Jetty Hash Collision Denial Of Service Vulnerability
  • CVE-2011-4461: Jetty 8.1.0.RC2 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
  • OSVDB ID: 78117: Jetty Hash Collision Form Parameter Parsing Remote DoS
  • SA47408: Jetty Web Form Hash Collision Denial of Service Vulnerability
  • SA50738: IBM Sterling Secure Proxy Jetty Web Form Hash Collision Denial of Service Vulnerability
  • SA51586: IBM InfoSphere BigInsights Java and Jetty Denial of Service Vulnerabilities
  • SA52882: IBM InfoSphere Replication Server Jetty Hash Collision Denial of Service Vulnerability
  • US-CERT VU#903934: Hash table implementations vulnerable to algorithmic complexity attacks

Platforms Affected:

  • IBM InfoSphere BigInsights 1.1.0
  • IBM InfoSphere BigInsights 1.2.0
  • IBM InfoSphere BigInsights 1.3.0
  • IBM InfoSphere BigInsights 1.4.0
  • IBM InfoSphere Replication Server 10.1
  • IBM InfoSphere Replication Server 9.7
  • IBM Sterling Connect Enterprise for UNIX 2.4
  • IBM Sterling Connect Enterprise for UNIX 2.5
  • IBM Sterling Secure Proxy 2.0
  • IBM Sterling Secure Proxy 3.3.0.1
  • IBM Sterling Secure Proxy 3.4.0
  • Mort Bay Consulting Jetty 6
  • Mort Bay Consulting Jetty 7

Reported:

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.

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