CVE-2021-28847 Denial of service in n/a

High 7.5 Published 3 Jun 2021 Updated 3 Aug 2024

A remote server can cause a denial of service in MobaXterm by sending rapid tab title change requests, hanging the Windows GUI.

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-2021-28847?

CVE-2021-28847 is a high-severity denial of service vulnerability in n/a, published on 3 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

MobaXterm before 21.0 allows remote servers to cause a denial of service (Windows GUI hang) via tab title change requests that are sent repeatedly at high speed, which results in many SetWindowTextA or SetWindowTextW calls.

Which versions are affected by CVE-2021-28847?

It affects 1 product.

Products include Mobatek Mobaxterm.

How do I fix CVE-2021-28847?

No fix has been published for CVE-2021-28847 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-2021-28847 being exploited?

There is no known exploitation of CVE-2021-28847 in the wild and no public exploit code.

Sources

Also known as GHSA-whgp-9qjc-434f.