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Ruby "cgi.rb" Denial of Service Vulnerability
Secunia Advisory: SA13123
Release Date: 2004-11-08
Last Update: 2006-12-12
Popularity: 11,170 views

Critical:
Less critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

Software:Ruby 1.8.x

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CVE reference:CVE-2004-0983
CVE-2006-5467
CVE-2006-6303


Description:
Two vulnerabilities have been reported in Ruby, which can be exploited by malicious people to cause a DoS (Denial of Service).

1) An input validation error in "cgi.rb" can be exploited to consume a large amount of CPU resources by sending a specially crafted HTTP POST request.

2) An unspecified error in "cgi.rb" when handling certain HTTP requests can be exploited to consume a large amount of CPU resources by sending a specially crafted HTTP request.

Solution:
Update to 1.8.5-p2.

Provided and/or discovered by:
Reported by vendor.

Changelog:
2006-10-27: Previous patch is incomplete. Updated "Solution" section, added new link and CVE reference.
2006-12-04: Updated "Solution" section. Added information on second vulnerability.
2006-12-12: Added CVE reference.

Original Advisory:
Ruby:
http://www.ruby-lang.org/en/news/2006/11/03/CVE-2006-5467/
http://www.ruby-lang.org/en/news/2006...her-dos-vulnerability-in-cgi-library/

http://www.debian.org/security/2004/dsa-586
http://rubyforge.org/pipermail/mongrel-users/2006-October/001946.html

Other References:
JVN:
http://jvn.jp/jp/JVN%2384798830/index.html


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