PSIRTInteger Overflow in ipsec ike
Summary
An Integer Overflow or Wraparound vulnerability [CWE-190] in FortiOS and FortiSASE FortiOS tenant IPsec IKEv1 service may allow an authenticated attacker to crash the IPsec tunnel via crafted requests, resulting in potential denial of service.
| Version | Affected | Solution |
|---|---|---|
| FortiOS 7.6 | Not affected | Not Applicable |
| FortiOS 7.4 | 7.4.0 through 7.4.4 | Upgrade to 7.4.5 or above |
| FortiOS 7.2 | 7.2 through 7.2.11 | Upgrade to 7.2.12 or above |
| FortiOS 7.0 | Not affected | Not Applicable |
| FortiOS 6.4 | Not affected | Not Applicable |
Fortinet in Q4/24 has remediated this issue in FortiSASE version 24.4.a and hence the customers need not perform any action
Virtual Patch named "FG-VD-10006838.0day." is available in FMWP db update 24.090
Workaround:
Configure IPsec VPN Tunnel using IKE v2.
Acknowledgement
Fortinet is pleased to thank Vang3lis and N3vv from VARAS@IIE for reporting this vulnerability under responsible disclosure.Timeline
2025-01-14: Initial publication2025-01-15: Added IPS package info
2025-04-11: Added Workaround
2025-05-07: Added FortiOS 7.2 fix indication