RubySec

Providing security resources for the Ruby community

CVE-2011-5036 (rack): CVE-2011-5036 rubygem-rack: hash table collisions DoS (oCERT-2011-003)

ADVISORIES

GEM

rack

SEVERITY

CVSS v2: 5.0 (Medium)

PATCHED VERSIONS

  • ~> 1.1.3
  • ~> 1.2.5
  • ~> 1.3.6
  • >= 1.4.0

DESCRIPTION

Rack before 1.1.3, 1.2.x before 1.2.5, and 1.3.x before 1.3.6 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.