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Date: Thu, 6 Jul 2017 14:20:32 -0500
From: KoreLogic Disclosures <>
Subject: KL-001-2017-012 : Barracuda WAF Grub Password Complexity

KL-001-2017-012 : Barracuda WAF Grub Password Complexity

Title: Barracuda WAF Grub Password Complexity
Advisory ID: KL-001-2017-012
Publication Date: 2017.07.06
Publication URL:

1. Vulnerability Details

     Affected Vendor: Barracuda
     Affected Product: Web Application Firewall V360
     Affected Version: Firmware v8.0.1.014
     Platform: Embedded Linux
     CWE Classification: CWE-259: Use of Hard-coded Password
     Impact: Privileged Access
     Attack vector: Password Cracking

2. Vulnerability Description

     The grub password for all V360 virtual appliances is four
     characters in length and, as a result, may be trivially easy
     to crack.

3. Technical Description

     # grep "pbkdf2" grub.cfg
     password_pbkdf2 root

     This hash cracks to: bimg

4. Mitigation and Remediation Recommendation

     The vendor has patched this vulnerability in the lastest
     virtual appliance release.

5. Credit

     This vulnerability was discovered by Matt Bergin (@thatguylevel)
     of KoreLogic, Inc. and Joshua Hardin.

6. Disclosure Timeline

     2016.12.20 - KoreLogic sends vulnerability report and PoC to
     2016.12.21 - Barracuda acknowledges receipt of the vulnerability
     2017.01.09 - Barracuda informs KoreLogic that they are working
                  on remediation for this issue.
     2017.01.26 - Barracuda asks for additional time beyond the
                  standard 45 business day embargo to address this
                  and other issues reported by KoreLogic.
     2017.02.27 - 45 business days have elapsed since the issue was
     2017.04.10 - 75 business days have elapsed since the issue was
     2017.05.15 - 100 business days have elapsed since the issue was
     2017.05.24 - Barracuda updates KoreLogic on the status of the
                  remediation efforts.
     2017.06.13 - 120 business days have elapsed since the issue was
     2017.06.27 - Barracuda informs KoreLogic that the issue has
                  been fixed in the latest release of the WAF
                  virtual appliance.
     2017.07.06 - KoreLogic public disclosure.

7. Proof of Concept

     See 3. Technical Description

The contents of this advisory are copyright(c) 2017
KoreLogic, Inc. and are licensed under a Creative Commons
Attribution Share-Alike 4.0 (United States) License:

KoreLogic, Inc. is a founder-owned and operated company with a
proven track record of providing security services to entities
ranging from Fortune 500 to small and mid-sized companies. We
are a highly skilled team of senior security consultants doing
by-hand security assessments for the most important networks in
the U.S. and around the world. We are also developers of various
tools and resources aimed at helping the security community.

Our public vulnerability disclosure policy is available at:

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