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From:otr_(at)_bockcay.de <otr_(at)_bockcay.de>
Date:5 июля 2015 г.
Subject:CollabNet Subversion Edge downloadHook local file inclusion



# 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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