Actively exploited · Published Jun 13, 2023 · Assigned by fortinet
CVE-2023-27997
Critical 9.2 Exploited Ransomware
In plain English
A critical-severity heap buffer overflow in FortiOS from Fortinet. Attackers are actively exploiting it in the wild (listed by CISA on June 13, 2023). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 85.7% (higher than 99.7% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by Jul 4, 2023.
Official description
A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiOS-6K7K | 7.0.107.0.56.4.126.4.106.4.86.4.66.4.26.2.9 – through 6.2.13 |
| Fortinet | FortiProxy | 7.2.0 – through 7.2.37.0.0 – through 7.0.92.0.0 – through 2.0.121.2.0 – through 1.2.131.1.0 – through 1.1.6 |
| Fortinet | FortiOS | 7.2.0 – through 7.2.47.0.0 – through 7.0.116.4.0 – through 6.4.126.2.0 – through 6.2.136.0.0 – through 6.0.16 |
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:R