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AUSCERT External Security Bulletin Redistribution
ESB-2021.3912
FortiOS - Missing certificate CN/SAN validation leads to
information disclosure
16 November 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: FortiOS
Publisher: FortiGuard
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-41019
Original Bulletin:
https://www.fortiguard.com/psirt/FG-IR-21-074
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FortiOS - Missing certificate CN/SAN validation leads to information disclosure
IR Number : FG-IR-21-074
Date : Nov 2, 2021
Risk : 2/5
CVSSv3 Score : 3.2
Impact : Information disclosure
CVE ID : CVE-2021-41019
Affected Products: FortiOS: 6.4.6, 6.4.5, 6.4.4, 6.4.3, 6.4.2, 6.4.1, 6.4.0, 6.2.9, 6.2.8, 6.2.7, 6.2.6, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0, 7.0.0., 7.0.1
Language : English
Portuguese
Summary
An improper validation of certificate with host mismatch [CWE-297]
vulnerability in FortiOS may allow the connection to a malicious LDAP server
via options in GUI, leading to disclosure of sensitive information, such as AD
credentials.
Affected Products
FortiGate version 7.0.1 and below.
FortiGate version 6.4.6 and below.
FortiGate version 6.2.9 and below.
Solutions
Please upgrade to FortiGate version 7.0.2 or above.
Please upgrade to FortiGate version 6.4.7 or above.
Please upgrade to FortiGate version 6.2.10 or above.
Acknowledgement
Fortinet is pleased to thank John Headley from VPLS for reporting this
vulnerability under responsible disclosure.
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