Description
An integer overflow vulnerability in the source code of the QuickSec IPSec toolkit used in the VPN feature of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions on an affected device by sending a crafted IKE packet.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zyxel | ATP series firmware | versions 4.32 through 5.37 | — |
| Zyxel | USG FLEX series firmware | versions 4.50 through 5.37 | — |
| Zyxel | USG FLEX 50(W) series firmware | versions 4.16 through 5.37 | — |
| Zyxel | USG20(W)-VPN series firmware | versions 4.16 through 5.37 | — |
| Zyxel | VPN series firmware | versions 4.30 through 5.37 | — |
Advisories 1
- WID-SEC-2023-3017 Zyxel Firewall: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 27, 2023