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Secunia Advisory SA16904

Ruby Safe-Level Security Bypass and Server Classes Denial of Service
Secunia Advisory SA16904
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Release Date 2005-09-23
Last Update 2006-04-26
   
Popularity 14,950 views
Comments 0 comments

Criticality level Moderately criticalModerately critical
Impact DoS
Security Bypass
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Patch
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
Remediation status Secunia CSI, Secunia PSI
Automated scanning Secunia CSI, Secunia PSI
   
Software:
Ruby 1.6.x
Ruby 1.8.x

Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2005-2337 CVSS available in Customer Area
CVE-2006-1931 CVSS available in Customer Area
  

Description

Two vulnerabilities have been reported in Ruby, which can be exploited by malicious people to bypass certain security restrictions, and to cause a DoS (Denial of Service).

1) An error exists in "eval.c" when enforcing safe-level protections. This can be exploited to execute certain insecure methods.

The vulnerability has been reported in the following versions:
* Ruby version 1.6.8 and prior (old release).
* Ruby version 1.8.2 and prior (stable).
* Ruby version 1.9.0 2005-09-01 and prior (development).

2) An error within the XMLRPC::Server and WEBrick::HTTPServer classes can cause a server that is written using the classes to stop accept connections via a specially-crafted request that causes the server block on a socket operation.

The vulnerability has been reported in the following versions:
* Ruby version 1.8.2 and prior (stable).
* Ruby version 1.9.0 prior to 2005-07-10 (development).


Solution
Update to the fixed versions.
Further details available in Customer Area

Provided and/or discovered by
The vendor credits Dr. Yutaka Oiwa and Mr. Tanaka Tetsu, Research Center for Information Security, National Institute of Advanced Industrial Science and Technology.

Changelog
Further details available in Customer Area

Original Advisory
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-dev/27787

JP Vendor Status Notes (Japanese):
http://jvn.jp/jp/JVN%2362914675/243894/index.html

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Ruby Safe-Level Security Bypass and Server Classes Denial of Service
 
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