CVE-2021-27179 Denial of service in n/a

High 7.5 Published 10 Feb 2021 Updated 3 Aug 2024

Attackers can crash the telnet daemon on FiberHome HG6245D devices by sending a specific string, causing a denial of service.

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-2021-27179?

CVE-2021-27179 is a high-severity denial of service vulnerability in n/a, published on 10 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered on FiberHome HG6245D devices through RP2613. It is possible to crash the telnet daemon by sending a certain 0a 65 6e 61 62 6c 65 0a 02 0a 1a 0a string.

Weakness: CWE-20

Which versions are affected by CVE-2021-27179?

It affects 1 product.

Products include Fiberhome Hg6245d Firmware.

How do I fix CVE-2021-27179?

No fix has been published for CVE-2021-27179 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-2021-27179 being exploited?

There is no known exploitation of CVE-2021-27179 in the wild and no public exploit code.

Sources

Also known as GHSA-8r95-q845-45m7.