Barracuda WAF V360 Firmware 8.0.1.014 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: 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  
  
  
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:  
http://creativecommons.org/licenses/by-sa/4.0/  
  
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.  
https://www.korelogic.com/about-korelogic.html  
  
Our public vulnerability disclosure policy is available at:  
https://www.korelogic.com/KoreLogic-Public-Vulnerability-Disclosure-Policy.v2.2.txt  
  
`