CVE-2022-43393 Denial of service in GS1920-24v2 firmware
An unauthenticated attacker can cause a denial-of-service condition on Zyxel GS1920-24v2 switches by corrupting memory via improper HTTP request handling.
- 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-2022-43393?
CVE-2022-43393 is a high-severity denial of service vulnerability in Zyxel GS1920-24v2 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
An improper check for unusual or exceptional conditions in the HTTP request processing function of Zyxel GS1920-24v2 firmware prior to V4.70(ABMH.8)C0, which could allow an unauthenticated attacker to corrupt the contents of the memory and result in a denial-of-service (DoS) condition on a vulnerable device.
Weakness: CWE-754
Which versions are affected by CVE-2022-43393?
It affects 45 products.
Products include Zyxel Gs1350-12hp Firmware, Zyxel Gs1350-18hp Firmware, Zyxel Gs1350-26hp Firmware, Zyxel Gs1350-6hp Firmware, Zyxel Gs1915-24e Firmware, Zyxel Gs1915-24ep Firmware and 39 more.
How do I fix CVE-2022-43393?
No fix has been published for CVE-2022-43393 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-43393 being exploited?
There is no known exploitation of CVE-2022-43393 in the wild and no public exploit code.
Sources
Also known as GHSA-36hf-3x3x-vfch.