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.


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.x
  • IBM Sterling Secure Proxy 3.3
  • IBM Sterling Secure Proxy 3.4
  • Mort Bay Consulting Jetty 6
  • Mort Bay Consulting Jetty 7

Reported:

Dec 28, 2011

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