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CVE-2011-5036: Hash Collision Form Parameter Parsing Remote DoS

December 29, 2011 (updated October 30, 2013)

This package contains a flaw that may allow a remote denial of service. The issue is triggered when an attacker sends multiple crafted parameters which trigger hash collisions, and will result in loss of availability for the program via CPU consumption.

References

  • osvdb.org/show/osvdb/78121
  • github.com/rack/rack/commit/09c5e53f11a491c25bef873ed146842f3cd03228

Code Behaviors & Features

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Affected versions

All versions before 1.1.3, all versions starting from 1.2.0 before 1.2.5, all versions starting from 1.3.0.beta before 1.3.6

Fixed versions

  • 1.1.3
  • 1.2.5
  • 1.3.6
  • 1.4.0

Solution

Upgrade to versions 1.1.3, 1.2.5, 1.3.6, 1.4.0 or above.

Impact 5 MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Learn more about CVSS

Weakness

  • CWE-310

Source file

gem/rack/CVE-2011-5036.yml

Spotted a mistake? Edit the file on GitLab.

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