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Insecure Library Loading
Moderately critical

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

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Release Date:  2005-09-23    Last Update:  2006-04-26    Views:  16,539

Secunia Advisory SA16904

Where:

From remote

Impact:

DoS, Security Bypass

Solution Status:

Vendor Patch

CVE Reference(s):

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 to Secunia VIM customers

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.

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

Deep Links:
Links available to Secunia VIM customers

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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