National Cyber-Alert System
Vulnerability Summary for CVE-2008-3656
Original release date:08/13/2008
Last revised:05/16/2009
Source:
US-CERT/NIST
Overview
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.
Impact
CVSS Severity (version 2.0):
Impact Subscore:
6.9
Exploitability Subscore:
10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
**NOTE: Access Complexity scored Low due to insufficient information
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown
References to Advisories, Solutions, and Tools
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US-CERT Technical Alert: TA09-133A
Name: TA09-133A
External Source: FEDORA
Name: FEDORA-2008-8736
External Source: FEDORA
Name: FEDORA-2008-8738
External Source: XF
Name: ruby-webrick-dos(44371)
External Source: VUPEN
Name: ADV-2009-1297
External Source: UBUNTU
Name: USN-651-1
External Source: SECTRACK
Name: 1020654
External Source: BID
Name: 30644
External Source: BUGTRAQ
Name: 20080831 rPSA-2008-0264-1 ruby
External Source: CONFIRM
Name: http://www.ruby-lang.org/en/news/2008/08/08/multiple-vulnerabilities-in-ruby/
External Source: REDHAT
Name: RHSA-2008:0897
External Source: VUPEN
Name: ADV-2008-2334
External Source: DEBIAN
Name: DSA-1652
External Source: DEBIAN
Name: DSA-1651
External Source: CONFIRM
Name: http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0264
External Source: CONFIRM
Name: http://support.avaya.com/elmodocs2/security/ASA-2008-424.htm
External Source: CONFIRM
Name: http://support.apple.com/kb/HT3549
External Source: GENTOO
Name: GLSA-200812-17
External Source: SECUNIA
Name: 35074
External Source: SECUNIA
Name: 33178
External Source: SECUNIA
Name: 32371
External Source: SECUNIA
Name: 32256
External Source: SECUNIA
Name: 32255
External Source: SECUNIA
Name: 32219
External Source: SECUNIA
Name: 32165
External Source: SECUNIA
Name: 31697
External Source: SECUNIA
Name: 31430
External Source: APPLE
Name: APPLE-SA-2009-05-12
External Source: CONFIRM
Name: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=494401