CVE-2023-6764 Other in ATP series firmware

What is CVE-2023-6764?

CVE-2023-6764 is a high-severity vulnerability in Zyxel ATP series firmware, published on 20 Feb 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A format string vulnerability in a function of the IPSec VPN feature 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, and USG20(W)-VPN series firmware versions from 4.16 through 5.37 Patch 1 could allow an attacker to achieve unauthorized remote code execution by sending a sequence of specially crafted payloads containing an invalid pointer; however, such an attack would require detailed knowledge of an affected device’s memory layout and configuration.

Weakness: CWE-134

Which versions are affected by CVE-2023-6764?

It affects 21 products.

Products include Zyxel Atp100 Firmware, Zyxel Atp100w Firmware, Zyxel Atp200 Firmware, Zyxel Atp500 Firmware, Zyxel Atp700 Firmware, Zyxel Atp800 Firmware and 15 more.

How do I fix CVE-2023-6764?

No fix has been published for CVE-2023-6764 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-6764 being exploited?

There is no known exploitation of CVE-2023-6764 in the wild and no public exploit code.

Other vulnerabilities in Zyxel ATP series firmware

• CVE-2023-33009 Zyxel Multiple Firewalls Buffer Overflow Exploited Critical 9.8
• CVE-2023-33010 Zyxel Multiple Firewalls Buffer Overflow Exploited Critical 9.8
• CVE-2023-28771 Zyxel Multiple Firewalls OS Command Injection Exploited Critical 9.8
• CVE-2022-30525 Zyxel Multiple Firewalls OS Command Injection Exploited Critical 9.8
• CVE-2020-29583 Zyxel Multiple Products Use of Hard-Coded Credentials Exploited Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-83ff-cpf7-ghwf.