CVE-2024-23113

CVE-2024-23113 is a use of externally-controlled format string (CWE-134) in multiple Fortinet products, allowing an unauthenticated remote attacker to execute unauthorized code or commands by sending specially crafted packets to an affected device. The flaw carries a critical CVSS 3.1 score of 9.8 (network vector, no privileges or user interaction required, high impact on confidentiality, integrity, and availability). It affects FortiOS 7.0.0 through 7.0.13, 7.2.0 through 7.2.6, and 7.4.0 through 7.4.2; FortiProxy 7.0.0 through 7.0.14, 7.2.0 through 7.2.8, and 7.4.0 through 7.4.2; FortiPAM 1.0.0 through 1.0.3, 1.1.0 through 1.1.2, and 1.2.0; and FortiSwitchManager 7.0.0 through 7.0.3 and 7.2.0 through 7.2.3. CISA added the vulnerability to the Known Exploited Vulnerabilities catalog on 2024-10-09 and warns it is likely being exploited in the wild, though no public proof-of-concept is known. Scanning coverage reported in the trade press indicates roughly 87,000 or more internet-exposed Fortinet devices remained vulnerable and open to attack after disclosure.

What to do: Upgrade affected FortiOS, FortiProxy, FortiPAM, and FortiSwitchManager deployments to a patched release per Fortinet's advisory, since the data does not specify fixed build numbers. Until patching is complete, restrict management interface access to trusted sources, minimize internet exposure of affected devices, and verify your version falls within the affected ranges above. Treat this as an actively exploited vulnerability per CISA's KEV listing (added 2024-10-09) and prioritize it accordingly.