Advisory: Critical buffer underflow vulnerability in FortiOS impacting administrative interface CVE-2023-25610

We’re aware of a critical buffer underflow vulnerability CVE-2023-25610 affecting FortiOS’ administrative interface.

This vulnerability could allow a malicious actor to remotely execute arbitrary code on the device. It may also allow an unauthenticated actor to perform a Denial of Service on the GUI by specifically crafting requests.

The vulnerable versions are:
FortiOS version 7.2.0 through 7.2.3
FortiOS version 7.0.0 through 7.0.9
FortiOS version 6.4.0 through 6.4.11
FortiOS version 6.2.0 through 6.2.12
FortiOS 6.0 all versions
FortiProxy version 7.2.0 through 7.2.2
FortiProxy version 7.0.0 through 7.0.8
FortiProxy version 2.0.0 through 2.0.11
FortiProxy 1.2 all versions
FortiProxy 1.1 all versions

Solutions
Please upgrade to FortiOS version 7.4.0 or above
Please upgrade to FortiOS version 7.2.4 or above
Please upgrade to FortiOS version 7.0.10 or above
Please upgrade to FortiOS version 6.4.12 or above
Please upgrade to FortiOS version 6.2.13 or above
Please upgrade to FortiProxy version 7.2.3 or above
Please upgrade to FortiProxy version 7.0.9 or above
Please upgrade to FortiProxy version 2.0.12 or above
Please upgrade to FortiOS-6K7K version 7.0.10 or above
Please upgrade to FortiOS-6K7K version 6.4.12 or above
Please upgrade to FortiOS-6K7K version 6.2.13 or above

Please find a list of affected Fortinet products and the official threat advisory here.

Workaround
Limit IP addresses that can access the administrative interface. For guidance on how to do this please click here.