CVE-2023-6397 Null dereference in ATP series firmware
A LAN-based attacker can cause denial-of-service on Zyxel firewalls by triggering a null pointer dereference via a crafted RAR file when Anti-Malware is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-6397?
CVE-2023-6397 is a medium-severity vulnerability in Zyxel ATP series firmware, published on 20 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-476
Which versions are affected by CVE-2023-6397?
It affects 19 products.
Products include Zyxel Atp100 Firmware, Zyxel Atp100w Firmware, Zyxel Atp200 Firmware, Zyxel Atp500 Firmware, Zyxel Atp700 Firmware, Zyxel Atp800 Firmware and 13 more.
How do I fix CVE-2023-6397?
No fix has been published for CVE-2023-6397 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-6397 being exploited?
There is no known exploitation of CVE-2023-6397 in the wild and no public exploit code.
Other vulnerabilities in Zyxel ATP series firmware
- CVE-2023-33009 Zyxel Multiple Firewalls Buffer Overflow
- CVE-2023-33010 Zyxel Multiple Firewalls Buffer Overflow
- CVE-2023-28771 Zyxel Multiple Firewalls OS Command Injection
- CVE-2022-30525 Zyxel Multiple Firewalls OS Command Injection
- CVE-2020-29583 Zyxel Multiple Products Use of Hard-Coded Credentials
Sources
Also known as GHSA-wj52-rfj4-xjcm.