CVE-2021-43722 Memory corruption in n/a

Critical 9.8 Published 31 Mar 2022 Updated 4 Aug 2024

A buffer overflow in the D-Link DIR-645 router allows attackers to execute arbitrary code via a crafted SOAPAction header.

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-2021-43722?

CVE-2021-43722 is a critical memory corruption vulnerability in n/a, published on 31 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

D-Link DIR-645 1.03 A1 is vulnerable to Buffer Overflow. The hnap_main function in the cgibin handler uses sprintf to format the soapaction header onto the stack and has no limit on the size.

Weakness: CWE-787

Which versions are affected by CVE-2021-43722?

It affects 1 product.

Products include Dlink Dir-645 Firmware.

How do I fix CVE-2021-43722?

No fix has been published for CVE-2021-43722 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-43722 being exploited?

There is no known exploitation of CVE-2021-43722 in the wild and no public exploit code.

Sources

Also known as GHSA-g42p-p7j5-qqx7.