CVE-2008-3656

WEBrick <1.9 - DoS

Title source: llm

Description

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.

Exploits (2)

exploitdb WORKING POC

rubydosmultiple

https://www.exploit-db.com/exploits/32222

View Code ZIP pw:eip

metasploit WORKING POC

rubypoc

https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/http/webrick_regex.rb

View Code ZIP pw:eip

References (30)

[Issue Tracking] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=494401

[Mailing List] http://lists.apple.com/archives/security-announce/2009/May/msg00002.html

[Vendor Advisory] http://support.apple.com/kb/HT3549

[Vendor Advisory] http://support.avaya.com/elmodocs2/security/ASA-2008-424.htm

[Vendor Advisory] http://www.redhat.com/support/errata/RHSA-2008-0897.html

[Exploit] http://www.ruby-lang.org/en/news/2008/08/08/multiple-vulnerabilities-in-ruby/

[US Government Resource] http://www.us-cert.gov/cas/techalerts/TA09-133A.html

[Third Party Advisory, VDB Entry] https://exchange.xforce.ibmcloud.com/vulnerabilities/44371

[Vendor Advisory] https://usn.ubuntu.com/651-1/

[Vendor Advisory] https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00259.html

[Vendor Advisory] https://www.redhat.com/archives/fedora-package-announce/2008-October/msg00299.html

[Third Party Advisory] http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0264

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/archive/1/495884/100/0/threaded

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/30644

[Third Party Advisory] http://www.debian.org/security/2008/dsa-1651

[Third Party Advisory] http://www.debian.org/security/2008/dsa-1652

[Third Party Advisory] http://security.gentoo.org/glsa/glsa-200812-17.xml

[Third Party Advisory, VDB Entry] https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9682

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id?1020654

[Third Party Advisory] http://secunia.com/advisories/31430

... and 10 more

Scores

EPSS 0.6509

EPSS Percentile 98.5%

Details

CWE

CWE-399

Status published

Products (11)

ruby-lang/ruby 1.6.8

ruby-lang/ruby 1.8.0

ruby-lang/ruby 1.8.1 (2 CPE variants)

ruby-lang/ruby 1.8.2 (4 CPE variants)

ruby-lang/ruby 1.8.3 (4 CPE variants)

ruby-lang/ruby 1.8.4 (4 CPE variants)

ruby-lang/ruby 1.8.5 p11 (11 CPE variants)

ruby-lang/ruby 1.8.6 (6 CPE variants)

ruby-lang/ruby 1.8.7 (8 CPE variants)

ruby-lang/ruby 1.9.0

... and 1 more

Published Aug 13, 2008

Tracked Since Feb 18, 2026