bugtraq - CollabNet Subversion Edge weak password storage mechanism

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Message-ID: <20150628185035.GI18975@tortuga>
Date: Sun, 28 Jun 2015 20:50:35 +0200
From: Oliver-Tobias Ripka <otr@...kcay.de>
To: undisclosed-recipients: ;
Subject: CollabNet Subversion Edge weak password storage mechanism

# Vuln Title: The CollabNet Subversion Edge stores passwords as unsalted MD5 hashes
# 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: Insecure password storage

# 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 stores passwords as unsalted MD5
hashes. Unsalted MD5 hashes can easily be cracked by brute forcing the password.

Fix proposal:

Use a strong password storage algorithm like scrypt or PBKDF2.

Vendor fix:

We opted to go with bcrypt. It has more usage than scrypt and does not have any
known vulnerabilities; it is  also more easily supported with the subversion
server, not just the Edge admin console. The strength factor is configurable.