Review reviewHigh

CVE-2023-42790

Fortinet FortiProxy, FortiOS, fortiproxy

A stack-based buffer overflow vulnerability in Fortinet FortiOS 7.4.0 through 7.4.1, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0.0 through 7.0.12, FortiOS 6.4.0 through 6.4.14, FortiOS 6.2.0 through 6.2.15, FortiProxy 7.4.0, FortiProxy 7.2.0 through 7.2.6, FortiProxy 7.0.0 through 7.0.12, FortiProxy 2.0.0 through 2.0.13, FortiSASE 23.2.b allows attacker to execute unauthorized code or commands via specially crafted HTTP requests.

CVSS: 8.1
EPSS: 1.07%
CISA KEV: Not listed
Published: 2024.03.13

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability1.07%

Technical severityCVSS 8.1

Vulnerability overview

Affected product and versions

Product: Fortinet FortiProxy, FortiOS, fortiproxy
Affected versions: 7.4.0, 7.2.0, 7.0.0, 2.0.0, 6.4.0, 6.2.0, >= 2.0.0 <= 2.0.13, >= 7.0.0 <= 7.0.12, >= 7.2.0 <= 7.2.6, >= 6.2.0 <= 6.2.15, >= 6.4.0 <= 6.4.14, >= 7.2.0 <= 7.2.5, >= 7.4.0 <= 7.4.1
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Fortinet FortiProxy, FortiOS, fortiproxy and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-121