Description
A format string vulnerability in Zyxel ATP series firmware versions from 4.32 through 5.37 Patch 1, USG FLEX series firmware versions from 4.50 through 5.37 Patch 1, USG FLEX 50(W) series firmware versions from 4.16 through 5.37 Patch 1, USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1, and USG FLEX H series firmware versions from 1.10 through 1.10 Patch 1 could allow an authenticated IPSec VPN user to cause DoS conditions against the “deviceid” daemon by sending a crafted hostname to an affected device if it has the “Device Insight” feature enabled.
CVSS breakdown
CVSS 3.1
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected products
- Zyxel / ATP series firmwareversion 4.32 through 5.37 Patch 1 – version 4.32 through 5.37 Patch 1
- Zyxel / USG20(W)-VPN series firmwareversion 4.16 through 5.37 Patch 1 – version 4.16 through 5.37 Patch 1
- Zyxel / USG FLEX 50(W) series firmwareversion 4.16 through 5.37 Patch 1 – version 4.16 through 5.37 Patch 1
- Zyxel / USG FLEX H series firmwareversion 1.10 through 1.10 Patch 1 – version 1.10 through 1.10 Patch 1
- Zyxel / USG FLEX series firmwareversion 4.50 through 5.37 Patch 1 – version 4.50 through 5.37 Patch 1