Faiblesses connexes
CWE-ID |
Nom de la faiblesse |
Source |
CWE-22 |
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. |
|
Métriques
Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
V2 |
5 |
|
AV:N/AC:L/Au:N/C:P/I:N/A:N |
[email protected] |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 5215
Date de publication : 2008-03-05 23h00 +00:00
Auteur : DSecRG
EDB Vérifié : Yes
------------------------------------------------------------------------------------
Digital Security Research Group [DSecRG] Advisory #DSECRG-08-018
Application: Ruby 1.8.6 (WEBrick Web server Toolkit and applications that used WEBrick, like Metasploit 3.1)
Versions Affected:
1.8.4 and all prior versions
1.8.5-p114 and all prior versions
1.8.6-p113 and all prior versions
1.9.0-1 and all prior version
Vendor URL: http://www.ruby-lang.org/
Bugs: Directory traversal File Download
Exploits: YES
Reported: 20.02.2008
Vendor response: 22.02.2008
Solution: 03.03.2008
Date of Public Advisory: 06.03.2008
Authors: Alexandr Polyakov, Stas Svistunovich
Digital Security Research Group [DSecRG] (research [at] dsec [dot] ru)
Description
***********
WEBrick Httpd server has directory traversal security vulnerability.
WEBrick is an HTTP server library written in Ruby that uses servlets to extend its capabilities.
Built into WEBrick are four servlets, handling CGI, ERb, file directories, and a generic Proc servlet.
Ruby on Rails uses WEBrick as a quick and easy webserver to start developing your Rails applications.
However, for whatever ease of development WEBrick adds to your application, it is generally considered not suitable for any production environment.
Details
*******
The following programs are vulnerable.
Programs that publish files using WEBrick::HTTPServer.new with the :DocumentRoot option
Programs that publish files using WEBrick::HTTPServlet::FileHandler
Affected systems are:
1. Systems that accept backslash (\) as a path separator, such as Windows.
2. Systems that use case insensitive filesystems such as NTFS on Windows, HFS on Mac OS X.
This vulnerability has the following impacts.
1. Attacker can access private files by sending a url with url encoded backslash (\). This exploit works only on systems that accept backslash as a path separator.
Example:
http://[server]:[port]/..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c/boot.ini
2. Attacker can access files that matches to the patterns specified by the :NondisclosureName option (the default value is [".ht*", "*~"]). This exploit works only on systems that use case insensitive filesystems.
Additional info
***************
WEBrick is used to build own HTTP servers and used in many applications such as Metasploit 3.1 and Karma Tools
Fix Information
***************
fixed on 03.03.2008.
http://www.ruby-lang.org/en/news/2008/03/03/webrick-file-access-vulnerability/
Patches can be downloaded here:
1.8 series
Please upgrade to 1.8.5-p115 or 1.8.6-p114.
<URL:ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.5-p115.tar.gz> (md5sum: 20ca6cc87eb077296806412feaac0356)
<URL:ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.6-p114.tar.gz> (md5sum: 500a9f11613d6c8ab6dcf12bec1b3ed3)
1.9 series
Please apply the following patch to lib/webrick/httpservlet/filehandler.rb.
<URL:ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.0-1-webrick-vulnerability-fix.diff> (md5sum: b7b58aed40fa1609a67f53cfd3a13257)
About
*****
Digital Security is leading IT security company in Russia, providing information security consulting, audit and
penetration testing services, risk analysis and ISMS-related services and certification for ISO/IEC 27001:2005 and PCI
DSS standards. Digital Security Research Group focuses on web application and database security problems with
vulnerability reports, advisories and whitepapers posted regularly on our website.
Contact: research [at] dsec [dot] ru
http://www.dsec.ru (in Russian)
# milw0rm.com [2008-03-06]
Products Mentioned
Configuraton 0
Ruby-lang>>Webrick >> Version -
Ruby-lang>>Ruby >> Version From (including) 1.8.0 To (excluding) 1.8.5.115
Ruby-lang>>Ruby >> Version From (including) 1.8.6 To (excluding) 1.8.6.114
Ruby-lang>>Ruby >> Version 1.9.0
Ruby-lang>>Ruby >> Version 1.9.0.1
Configuraton 0
Fedoraproject>>Fedora >> Version 7
Fedoraproject>>Fedora >> Version 8
Références