Out-of-bounds write in FortiOS - CVE-2024-21762
Published: February 9, 2024 / Updated: December 6, 2024
Vulnerability identifier: #VU86278
CSH Severity: Critical
CVSS v4: 9.3 [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]
CVE-ID: CVE-2024-21762
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerability details
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.
Affected software
FortiOS
RUGGEDCOM APE1808
RUGGEDCOM APE1808
How to mitigate CVE-2024-21762
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.
FortiOS - addressed in versions 6.2.16, 6.4.15, 7.0.14, 7.2.7, 7.4.3
Links to Public Exploits and PoC-codes
- Exploit #10949 - cve-2024-21762-poc (December 6, 2024)
- Exploit #10102 - cve-2024-21762-checker (June 21, 2024)
- Exploit #9743 - CVE-2024-21762 (April 19, 2024)
- Exploit #9734 - CVE-2024-21762-Checker (April 19, 2024)
- Exploit #9613 - CVE-2024-21762 (March 22, 2024)
- Exploit #9590 - cve-2024-21762-check (March 4, 2024)