CVE-2023-26209
Published: 09 March 2023
Summary
CVE-2023-26209 is a low-severity Improper Restriction of Excessive Authentication Attempts (CWE-307) vulnerability in Fortinet Fortideceptor. Its CVSS base score is 3.7 (Low).
Operationally, ranked in the top 4.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
A improper restriction of excessive authentication attempts vulnerability (CWE-307) affects Fortinet FortiDeceptor versions 3.1.x and earlier. The flaw resides in the product's handling of the login form and permits partial exhaustion of CPU and memory when the component receives repeated authentication attempts.
A remote unauthenticated attacker can exploit the issue over the network by submitting numerous HTTP requests to the login form. Successful abuse results in limited denial-of-service impact, with no confidentiality or integrity consequences, consistent with the CVSS 3.7 rating.
Fortinet published advisory FG-IR-20-078 to document the vulnerability. The current EPSS score of 0.1961 has remained essentially flat at its recorded peak of 0.1970.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-30034
Vulnerability details
A improper restriction of excessive authentication attempts vulnerability [CWE-307] in Fortinet FortiDeceptor 3.1.x and before allows a remote unauthenticated attacker to partially exhaust CPU and memory via sending numerous HTTP requests to the login form.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
This control directly enforces limits on consecutive invalid logon attempts and automatic response (e.g., lockout) to prevent brute-force exploitation of authentication mechanisms.
Specific conditions can include excessive failed attempts, triggering stronger authentication that restricts brute-force exploitation.