CVE-2022-4874 Auth bypass in NF20
Unauthenticated attackers can bypass authentication on Netcomm routers to access static content due to flawed session handling logic.
- 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-2022-4874?
CVE-2022-4874 is a high-severity authentication bypass vulnerability in Netcomm NF20, published on 11 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Authentication bypass in Netcomm router models NF20MESH, NF20, and NL1902 allows an unauthenticated user to access content. In order to serve static content, the application performs a check for the existence of specific characters in the URL (.css, .png etc). If it exists, it performs a "fake login" to give the request an active session to load the file and not redirect to the login page.
Weakness: CWE-287
Which versions are affected by CVE-2022-4874?
It affects 3 products.
Products include Netcommwireless Nf20 Firmware, Netcommwireless Nf20mesh Firmware, Netcommwireless Nl1902 Firmware.
How do I fix CVE-2022-4874?
No fix has been published for CVE-2022-4874 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2022-4874 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-4874 exists.
Other vulnerabilities in Netcomm NF20
Sources
Also known as GHSA-6pwv-hr7p-g77v.