CVE-2023-37926 Memory corruption in ATP series firmware
An authenticated local attacker can cause denial of service on Zyxel firewalls by triggering a buffer overflow via CLI log dumping.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-37926?
CVE-2023-37926 is a medium-severity memory corruption vulnerability in Zyxel ATP series firmware, published on 28 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A buffer overflow vulnerability in the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an authenticated local attacker to cause denial-of-service (DoS) conditions by executing the CLI command to dump system logs on an affected device.
Weakness: CWE-120
Which versions are affected by CVE-2023-37926?
It affects 1 product.
Products include Zyxel Zld.
How do I fix CVE-2023-37926?
No fix has been published for CVE-2023-37926 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-37926 being exploited?
There is no known exploitation of CVE-2023-37926 in the wild and no public exploit code.
Other vulnerabilities in Zyxel ATP series firmware
Sources
Also known as GHSA-fqwh-r468-g35c.