high
7.8
CWE
399
Advisory Published
CVE Published
Updated

CVE-2008-3656

First published: Fri Aug 08 2008(Updated: )

Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/ruby<0:1.8.1-7.el4_7.1
0:1.8.1-7.el4_7.1
redhat/ruby<0:1.8.5-5.el5_2.5
0:1.8.5-5.el5_2.5
Ruby=1.8.3-preview1
Ruby=1.8.2-preview4
Ruby=1.8.4-preview2
Ruby=1.8.1--9
Ruby=1.8.7-preview3
Ruby=1.8.7-p17
Ruby=1.9.0
Ruby=1.8.2-preview3
Ruby=1.8.6-p110
Ruby=1.8.5-p2
Ruby=1.8.5-preview5
Ruby=1.8.5-p12
Ruby=1.8.5-preview1
Ruby=1.8.7-p71
Ruby=1.8.4-preview1
Ruby=1.8.7-p22
Ruby=1.8.4
Ruby=1.8.3
Ruby<=1.8.5
Ruby=1.8.3-preview2
Ruby=1.8.2
Ruby=1.8.4-preview3
Ruby=1.8.7-preview2
Ruby=1.8.1
Ruby=1.8.2-preview2
Ruby=1.8.3-preview3
Ruby=1.8.6-preview1
Ruby=1.8.6-p114
Ruby=1.8.5-preview4
Ruby=1.8.5-preview2
Ruby=1.8.6-preview3
Ruby=1.8.0
Ruby=1.8.5-p11
Ruby=1.8.7
Ruby=1.6.8
Ruby=1.8.6-preview2
Ruby=1.8.5-p35
Ruby=1.8.5-p113
Ruby=1.8.5-p115
Ruby=1.8.7-preview1
Ruby=1.8.6
Ruby=1.8.7-preview4
Ruby=1.8.5-preview3

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2008-3656?

    CVE-2008-3656 is classified as a denial of service vulnerability in Ruby's WEBrick server.

  • How do I fix CVE-2008-3656?

    To fix CVE-2008-3656, upgrade to Ruby version 1.8.7-p72 or later.

  • What software is affected by CVE-2008-3656?

    CVE-2008-3656 affects Ruby versions 1.8.1 through 1.8.7-p71 and versions of Ruby 1.9 up to r18423.

  • Can CVE-2008-3656 be exploited remotely?

    Yes, CVE-2008-3656 can be exploited by context-dependent attackers to trigger denial of service remotely.

  • What functionalities does CVE-2008-3656 impact?

    CVE-2008-3656 impacts the WEBrick::HTTPUtils.split_header_value function's ability to handle headers, leading to potential service downtime.

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