#VU86278 Out-of-bounds write in FortiOS - CVE-2024-21762
Published: February 9, 2024 / Updated: December 6, 2024
Vulnerability identifier: #VU86278
Vulnerability risk: Critical
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2024-21762
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
FortiOS
FortiOS
Software vendor:
Fortinet, Inc
Fortinet, Inc
Description
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing HTTP requests in sslvpnd. A remote attacker can send specially crafted HTTP requests to the SSL-VPN service, trigger an out-of-bounds write and execute arbitrary code on the target system.
Note, the vulnerability is being actively exploited in the wild.
Remediation
Install updates from vendor's website.
As a workaround it is possible to disable SSL VPN. Note, disabling just the webmode is NOT a valid workaround.