Web Wiz Rich Text Editor Directory traversal + HTM/HTML file
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# AmnPardaz Security Research Team
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# Title: Web Wiz Rich Text Editor(TM)
# Vendor: http://www.webwizguide.com/
# Bug: Directory traversal + HTM/HTML file creation on the server
# Vulnerable Version: 4.0
# Exploit: Available
# Fix Available: No! Fast Solution is available.
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- Description:
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Web Wiz Rich Text Editor (RTE) is a free WYSIWYG HTML Rich Text Editor =20
that replaces standard textarea's with an advanced Word style HTMLarea.
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- Vulnerability:
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Input passed to the FolderName parameter in "RTE_file_browser.asp" is =20
not properly sanitised before being used. This can be exploited to =20
list directories, list txt and list zip files through directory =20
traversal attacks.
Also, "RTE_file_browser.asp" does not check user's session and an =20
unauthenticated attacker can perform this attack.
Moreover, by using "RTE_popup_save_file.asp" attacker can make his/her =20
HTML or HTM file on the server, so this can be used in XSS attacks or =20
making fake pages.
-POC:
http://[WebWiz =20
RTE]/RTE_file_browser.asp?look=3Dsave&sub=3D\.....\\\.....\\\.....\\\.....\\=
\.....\\\
http://[WebWiz RTE]/RTE_popup_save_file.asp
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- Fast Solution :
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1- You can see below lines in "RTE_file_browser.asp"
=09'Stip path tampering for security reasons
=09strSubFolderName =3D Replace(strSubFolderName, "../", "", 1, -1, 1)
=09strSubFolderName =3D Replace(strSubFolderName, "..\", "", 1, -1, 1)
=09strSubFolderName =3D Replace(strSubFolderName, "./", "", 1, -1, 1)
=09strSubFolderName =3D Replace(strSubFolderName, ".\", "", 1, -1, 1)
Only add this to them:
=09strSubFolderName =3D Replace(strSubFolderName, "/", "\", 1, -1, 1)
=09strSubFolderName =3D Replace(strSubFolderName, "\\", "\", 1, -1, 1)
=09strSubFolderName =3D Replace(strSubFolderName, "..", "", 1, -1, 1)
2- Rename "RTE_popup_save_file.asp" till main solution by vendor
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- Credit :
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Original Advisory: http://www.bugreport.ir/?/31
AmnPardaz Security Research & Penetration Testing Group
Contact: admin[4t}bugreport{d0t]ir
WwW.BugReport.ir
WwW.AmnPardaz.com