Format string error in ZyXEL Communications Corp. products - CVE-2023-6399
Published: February 20, 2024
Vulnerability identifier: #VU86615
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-6399
CWE-ID: CWE-134
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a format string error. A remote user on the local network can supply a specially crafted input that contains format string specifiers and cause a denial of service condition on the target system.
Affected software
ATP series
USG FLEX series
USG FLEX 50W
USG20W-VPN
USG FLEX series
USG FLEX 50W
USG20W-VPN
How to mitigate CVE-2023-6399
Install updates from vendor's website.
ATP series - update to 5.37 Patch 2
USG FLEX series - update to 5.37 Patch 2
USG FLEX 50W - update to 5.37 Patch 2
USG20W-VPN - update to 5.37 Patch 2
USG FLEX series - update to 5.37 Patch 2
USG FLEX 50W - update to 5.37 Patch 2
USG20W-VPN - update to 5.37 Patch 2