What is CVE-2023-42789?

CVE-2023-42789 is a critical-severity vulnerability in Fortinet Fortios, classified under Out-of-bounds Write. CVSS score: 9.3/10. Published 2024-03-12.

How severe is CVE-2023-42789?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Is CVE-2023-42789 known to be exploited?

7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Fortinet Fortios

CVE-2023-42789

A out-of-bounds write in Fortinet FortiOS 7.4.0 through 7.4.1, 7.2.0 through 7.2.5, 7.0.0 through 7.0.12, 6.4.0 through 6.4.14, 6.2.0 through 6.2.15, FortiProxy 7.4.0, 7.2.0 through 7.2.6, 7.0.0 through 7.0.12, 2.0.0 through 2.0.13 allows…

Vulnerability class: Buffer Overflow

EPSS: 0.283 (96.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C.

Affected products

Fortinet Fortios — versions 7.4.0, 7.2.0, 7.0.0
Fortinet Fortipam — versions 1.1.0, 1.0.0
Fortinet Fortiproxy — versions 7.4.0, 7.2.0, 7.0.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

References

https://fortiguard.com/psirt/FG-IR-23-328

Frequently asked questions

What is CVE-2023-42789?: CVE-2023-42789 is a critical-severity vulnerability in Fortinet Fortios, classified under Out-of-bounds Write. CVSS score: 9.3/10. Published 2024-03-12.
How severe is CVE-2023-42789?: Critical severity. CVSS v3 base score is 9.3 out of 10.
Is CVE-2023-42789 known to be exploited?: 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.