Description
A buffer overflow vulnerability in the ID processing function in Zyxel ATP series firmware versions 4.32 through 5.36 Patch 1, USG FLEX series firmware versions 4.50 through 5.36 Patch 1, USG FLEX 50(W) firmware versions 4.25 through 5.36 Patch 1, USG20(W)-VPN firmware versions 4.25 through 5.36 Patch 1, VPN series firmware versions 4.30 through 5.36 Patch 1, ZyWALL/USG series firmware versions 4.25 through 4.73 Patch 1, could allow an unauthenticated attacker to cause denial-of-service (DoS) conditions and even a remote code execution on an affected device.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zyxel | ATP series firmware | 4.32 through 5.36 Patch 1 | — |
| Zyxel | USG FLEX series firmware | 4.50 through 5.36 Patch 1 | — |
| Zyxel | USG FLEX 50(W) firmware | 4.25 through 5.36 Patch 1 | — |
| Zyxel | USG20(W)-VPN firmware | 4.25 through 5.36 Patch 1 | — |
| Zyxel | VPN series firmware | 4.30 through 5.36 Patch 1 | — |
| Zyxel | ZyWALL/USG series firmware | 4.25 through 4.73 Patch 1 | — |
Advisories 1
- WID-SEC-2023-1299 Zyxel Firewalls: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 5, 2023