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.