CVE-2022-43389 Memory corruption in NR7101 firmware
An unauthenticated attacker can execute OS commands or cause denial-of-service on Zyxel NR7101 devices via a buffer overflow in the web server library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-43389?
CVE-2022-43389 is a high-severity memory corruption vulnerability in Zyxel NR7101 firmware, published on 11 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A buffer overflow vulnerability in the library of the web server in Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an unauthenticated attacker to execute some OS commands or to cause denial-of-service (DoS) conditions on a vulnerable device.
Weakness: CWE-120
Which versions are affected by CVE-2022-43389?
It affects 17 products.
Products include Zyxel Ep240p Firmware, Zyxel Lte3202-M437 Firmware, Zyxel Lte3316-M604 Firmware, Zyxel Lte7480-M804 Firmware, Zyxel Lte7490-M904 Firmware, Zyxel Nebula Fwa510 Firmware and 11 more.
How do I fix CVE-2022-43389?
No fix has been published for CVE-2022-43389 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-2022-43389 being exploited?
There is no known exploitation of CVE-2022-43389 in the wild and no public exploit code.
Sources
Also known as GHSA-356g-gwg5-3vmc.