CVE-2020-5757 Command injection in Grandstream UCM6200 Series

Critical 9.8 Published 17 Jul 2020 Updated 4 Aug 2024

Authenticated attackers can execute arbitrary commands as root on Grandstream UCM6200 devices via crafted HTTP requests.

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-2020-5757?

CVE-2020-5757 is a critical command injection vulnerability in Grandstream UCM6200 Series, published on 17 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Grandstream UCM6200 series firmware version 1.0.20.23 and below is vulnerable to OS command injection via HTTP. An authenticated remote attacker can bypass command injection mitigations and execute commands as the root user by sending a crafted HTTP POST to the UCM's "New" HTTPS API.

Weakness: CWE-78

Which versions are affected by CVE-2020-5757?

It affects 3 products.

Products include Grandstream Ucm6202 Firmware, Grandstream Ucm6204 Firmware, Grandstream Ucm6208 Firmware.

How do I fix CVE-2020-5757?

No fix has been published for CVE-2020-5757 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2020-5757 being exploited?

There is no known exploitation of CVE-2020-5757 in the wild and no public exploit code.

Sources

Also known as GHSA-3f9w-43j6-x43v.