A null pointer dereference vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1 and USG FLEX series firmware versions from 4.50 through 5.37 Patch 1 could allow a LAN-based attacker to cause denial-of-service (DoS) conditions by downloading a crafted RAR compressed file onto a LAN-side host if the firewall has the “Anti-Malware” feature enabled.
A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Atp100_firmware | Zyxel | 4.32 (including) | 5.37 (excluding) |
| Atp100_firmware | Zyxel | 5.37 (including) | 5.37 (including) |
| Atp100_firmware | Zyxel | 5.37-patch1 (including) | 5.37-patch1 (including) |