Barracuda WAF V360 Firmware Grub Password Complexity

Credit: Matt Bergin
Risk: Low
Local: Yes
Remote: No
CWE: CWE-259

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 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: 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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