CVE-2010-5280 : Détail

CVE-2010-5280

Directory Traversal
A01-Broken Access Control
8.86%V4
Network
2012-11-26
22h00 +00:00
2018-10-10
16h57 +00:00
CVE.org
NVD
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Descriptions du CVE

Directory traversal vulnerability in the Community Builder Enhanced (CBE) (com_cbe) component 1.4.8, 1.4.9, and 1.4.10 for Joomla! allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the tabname parameter in a userProfile action to index.php. NOTE: this can be leveraged to execute arbitrary code by using the file upload feature.

Informations du CVE

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 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P nvd@nist.gov

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.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 15222

Date de publication : 2010-10-08 22h00 +00:00
Auteur : Delf Tonder
EDB Vérifié : Yes

Description: Joomla CBE suffers from a local file inclusion vulnerability. As CBE also offers file uploading functionality that allows to upload files that contain php-code, this can be used to execute arbitary system-commands on the host with the webservers privileges. Risk: High Affected versions: - CBE v1.4.10 - CBE v1.4.9 - CBE v1.4.8 (maybe older versions) Not affaceted: - CBE v1.4.11 (current) Vulnerable code: in cbe.php a file identified by the param "tabname" is included if the "ajaxdirekt" param is set, without sanatizing the value of "tabname" first: -- $ajaxdirekt = JRequest::getVar('ajaxdirekt', null); $tabname = JRequest::getVar('tabname', null); if ($ajaxdirekt) { $tabfile = JPATH_SITE.DS.'components'.DS.'com_cbe'.DS.'enhanced'.DS.$tabname.DS.$tabname.".php"; if (file_exists($tabfile)) { include_once($tabfile); } return; } -- Exploitation / poc: index.php?option=com_cbe&task=userProfile&user=23&ajaxdirekt=true&tabname=../../../CREDITS.php%00 will execute the CREDITS.php Addional attack-vectors: CBE offers a file-upload function for uploading user profile images. The uploaded file is not checked for beeing well-formed, it only needs to have the right mime-type and maybe (depends on profile-picture configuration) the right size, so we can embed php-code in the profile-picture. Lets say we have registered an account on the site with the user-id 23, then we can execute the backdoor by requesting: index.php?option=com_cbe&task=userProfile&user=23&ajaxdirekt=true&tabname=../../../images/cbe/23.gif%00 As we stay in the documents-root, we dont even have to worry about safe-mode directory restrictions, and using GIFs will bypass most of CBE's image pre-processing functions during file upload (except file- and image-size checks). Solutions: a) check if the contents of an uploaded file contains a php open-tag ('<?php') (requires that the php-short-open-tag option is disabled) b) Joomla offers several functions for accessing POST and GET params, i guess using getWord() instead of getVar() would be a better choice in this case. History: 04.10.2010 - vendor informed 07.10.2010 - vendor released fixed version 08.10.2010 - public disclosure Cheers Delf Tonder

Products Mentioned

Configuraton 0

Joomla-cbe>>Com_cbe >> Version 1.4.8

Joomla-cbe>>Com_cbe >> Version 1.4.9

Joomla-cbe>>Com_cbe >> Version 1.4.10

Joomla>>Joomla\! >> Version *

Références

http://www.securityfocus.com/bid/43873
Tags : vdb-entry, x_refsource_BID
http://secunia.com/advisories/41741
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.exploit-db.com/exploits/15222
Tags : exploit, x_refsource_EXPLOIT-DB
Les informations affichées sur CVE Find proviennent de plusieurs sources de référence rigoureusement sélectionnées. Les données CVE sont fournies par MITRE Corporation et la National Vulnerability Database (NVD). Le catalogue des vulnérabilités activement exploitées (KEV) provient de la Cybersecurity and Infrastructure Security Agency (CISA), tandis que les scores EPSS sont issus de FIRST.org. Enfin, les données relatives aux faiblesses logicielles (CWE) et aux schémas d'attaque courants (CAPEC) sont maintenues par MITRE Corporation, et les informations sur les configurations logicielles et matérielles (CPE) proviennent du NVD.