Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability (CVE-2023-27997)
Severity: critical · Patch status: patched · Since 2023-06-13 · CVE-2023-27997
Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests. CISA added CVE-2023-27997 to its Known Exploited Vulnerabilities catalog on Jun 13, 2023, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Jul 4, 2023 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
