Bug: Web Wiz Forums Directory traversal ( Ascii Version )

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Web Wiz Forums Directory traversal

Published
Credit
Risk
2008.01.29
AmnPardaz
Low
CWE
CVE
Local
Remote
CWE-22
CVE-2008-0480
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None

########################## WwW.BugReport.ir
###########################################
#
# AmnPardaz Security Research Team
#
# Title: Web Wiz Forums(TM)
# Vendor: http://www.webwizguide.com/
# Bug: Directory traversal
# Vulnerable Version: 9.07
# Exploit: Available
# Fix Available: No! Fast Solution is available.
########################################################################
###########

####################
- Description:
####################
Web Wiz Forums bulletin board system is the ideal forum package for
your website's community.

####################
- Vulnerability:
####################
Input passed to the FolderName parameter in "RTE_file_browser.asp" and
"file_browser.asp" are not properly sanitised before being used. This
can be exploited to list directories, list txt and list zip files
through directory traversal attacks.
Also, "RTE_file_browser.asp" does not check user's session and an
unauthenticated attacker can perform this attack.

-POC:
http://[WebWiz Forum]/RTE_file_browser.asp?look=Š‚=.....\.....\.....\

####################
- Fast Solution :
####################
You can see below lines in "RTE_file_browser.asp" and "file_browser.asp"

'Stip path tampering for security reasons
strSubFolderName = Replace(strSubFolderName, "../", "", 1, -1, 1)
strSubFolderName = Replace(strSubFolderName, "..", "", 1, -1, 1)
strSubFolderName = Replace(strSubFolderName, "./", "", 1, -1, 1)
strSubFolderName = Replace(strSubFolderName, ".", "", 1, -1, 1)

Only add this to them:
strSubFolderName = Replace(strSubFolderName, "/", "", 1, -1, 1)
strSubFolderName = Replace(strSubFolderName, "\", "", 1, -1, 1)
strSubFolderName = Replace(strSubFolderName, "..", "", 1, -1, 1)

####################
- Credit :
####################
Original Advisory: http://www.bugreport.ir/?/29
AmnPardaz Security Research & Penetration Testing Group
Contact: admin[4t}bugreport{d0t]ir
WwW.BugReport.ir
WwW.AmnPardaz.com

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Ascii Version