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: https://www.korelogic.com/Resources/Advisories/KL-001-2017-012.txt


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
grub.pbkdf2.sha512.10000.CA568B32B7E1F9A8ADC73224CD8AD1085B23FF5B69558D92E70961F4DEE3F5844CC4E3FC8FC4CBDB0941AC682B52DE64343F6847DF8AD480597B49EA65F48B41.0314A76ADA4989857110B3177617AECF8D38F99E417DCE2B1A289AD5F48C0DFC4969E76E10175399E8978DDE5DFD4B6E7EE808CD00CD6CA43512E92C2EB1D63A
     #

     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
                  Barracuda.
     2016.12.21 - Barracuda acknowledges receipt of the vulnerability
                  report.
     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
                  reported.
     2017.04.10 - 75 business days have elapsed since the issue was
                  reported.
     2017.05.15 - 100 business days have elapsed since the issue was
                  reported.
     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
                  reported.
     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


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KoreLogic, Inc. and are licensed under a Creative Commons
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