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CollabNet Subversion Edge Management downloadHook LFI

CollabNet Subversion Edge Management downloadHook LFI
Posted Jun 29, 2015
Authored by otr

The CollabNet Subversion Edge Management Frontend allows authenticated admins to read arbitrary local files via logfile "filename" parameter of the "downloadHook" action. Fixed in version 5.0.

tags | exploit, arbitrary, local, file inclusion
SHA-256 | 37d936d9d7e63a4ff0e4d5ba93bd86e716a8d053ae486aae462f028a417603cc

CollabNet Subversion Edge Management downloadHook LFI

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# Vuln Title: Local file inclusion in CollabNet Subversion Edge Management
# Frontend via logfile "filename" parameter of the "downloadHook" action
#
# Date: 28.06.2015
# Author: otr
# Software Link: https://www.open.collab.net/downloads/svnedge
# Vendor: CollabNet
# Version: 4.0.11
# Tested on: Fedora Linux
# Type: Local file inclusion
#
# Risk: Medium
# Status: public/fixed
# Fixed version: 5.0

Timeline:

2014-10-09 Flaw Discovered
2014-10-20 Vendor contacted
2014-10-21 Vendor response
2014-12-08 Vendor fix proposal
2014-12-08 Extension of embargo to 19.4.2015
2015-05-04 Extension of embargo until release of version 5.0
2015-05-18 Release of version 5.0 and public disclosure

Summary:

The CollabNet Subversion Edge Management Frontend allows authenticated admins to
read arbitrary local files via logfile "filename" parameter of the
"downloadHook" action

Vulnerability:

Example URL:
https://example.com:4434/csvn/repo/downloadHook/1?filename=../../../../../../etc/passwd

Fix proposal:

Remove feature or santizes the "filename" parameter so that no path traversals
and arbitrary file inclusions are possible.

Vendor fix:

[...] now allow only showing hooks/logs within the intended directories.
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