Description
A command injection vulnerability in the IPSec VPN feature of Zyxel ATP series firmware versions from V4.32 through V5.38, USG FLEX series firmware versions from V4.50 through V5.38, USG FLEX 50(W) series firmware versions from V4.16 through V5.38, and USG20(W)-VPN series firmware versions from V4.16 through V5.38 could allow an unauthenticated attacker to execute some OS commands on an affected device by sending a crafted username to the vulnerable device. Note that this attack could be successful only if the device was configured in User-Based-PSK authentication mode and a valid user with a long username exceeding 28 characters exists.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zyxel | ATP series firmware | versions V4.32 through V5.38 | — |
| Zyxel | USG FLEX series firmware | versions V4.50 through V5.38 | — |
| Zyxel | USG FLEX 50(W) series firmware | versions V4.16 through V5.38 | — |
| Zyxel | USG20(W)-VPN series firmware | versions V4.16 through V5.38 | — |
Advisories 2
- WID-SEC-2024-2031 Zyxel Firewall: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 20, 2024
- NCSC-2024-0357 Kwetsbaarheden verholpen in Zyxel Flex en USG Firewalls NCSC-NL (Netherlands) · Sep 3, 2024