CVE-2021-40284 Denial of service in n/a

Medium 6.5 Published 9 Sep 2021 Updated 4 Aug 2024

Authenticated remote attackers can cause a denial of service on D-Link DSL-3782 routers by sending a long string to the web interface.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-40284?

CVE-2021-40284 is a medium-severity denial of service vulnerability in n/a, published on 9 Sep 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

D-Link DSL-3782 EU v1.01:EU v1.03 is affected by a buffer overflow which can cause a denial of service. This vulnerability exists in the web interface "/cgi-bin/New_GUI/Igmp.asp". Authenticated remote attackers can trigger this vulnerability by sending a long string in parameter 'igmpsnoopEnable' via an HTTP request.

Weakness: CWE-120

Which versions are affected by CVE-2021-40284?

It affects 1 product.

Products include Dlink Dsl-3782 Firmware.

How do I fix CVE-2021-40284?

No fix has been published for CVE-2021-40284 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-2021-40284 being exploited?

There is no known exploitation of CVE-2021-40284 in the wild and no public exploit code.

Sources

Also known as GHSA-jp7p-c272-p959.