Main Vulnerability Database Vulnerabilities #VU78347

Format string error in ZyXEL Communications Corp. products - CVE-2023-33011

Published: July 18, 2023

Vulnerability identifier: #VU78347

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-33011

CWE-ID: CWE-134

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a format string error. A remote attacker on the local network can supply a specially crafted input that contains format string specifiers and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Affected software

ATP series
USG FLEX series
VPN series
USG FLEX 50W
USG20W-VPN

How to mitigate CVE-2023-33011

Install updates from vendor's website.

ATP series - update to 5.37
USG FLEX series - update to 5.37
USG FLEX 50W - update to 5.37
USG20W-VPN - update to 5.37
VPN series - update to 5.37

External References

https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers

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