CVE-2021-37273 Denial of service in n/a
Attackers can repeatedly restart the China Telecom EPON Tianyi Gateway, causing a denial of service for connected users.
- 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-2021-37273?
CVE-2021-37273 is a high-severity denial of service vulnerability in n/a, published on 28 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A Denial of Service issue exists in China Telecom Corporation EPON Tianyi Gateway ZXHN F450(EPON ONU) 3.0. Tianyi Gateway is a hardware terminal of "Optical Modem Smart Router." Attackers can use this vulnerability to restart the device multiple times.
Which versions are affected by CVE-2021-37273?
It affects 1 product.
Products include Chinatelecom Epon Tianyi Gateway Zxhn F450 Firmware.
How do I fix CVE-2021-37273?
No fix has been published for CVE-2021-37273 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-2021-37273 being exploited?
There is no known exploitation of CVE-2021-37273 in the wild and no public exploit code.
Sources
Also known as GHSA-gq9p-fgf8-xxr3.