CVE-2021-40239 Memory corruption in n/a

Critical 9.8 Published 11 Oct 2021 Updated 4 Aug 2024

A buffer overflow in Miniftpd's RETR command handler allows attackers to execute arbitrary code or crash the 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-2021-40239?

CVE-2021-40239 is a critical memory corruption vulnerability in n/a, published on 11 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A Buffer Overflow vulnerability exists in the latest version of Miniftpd in the do_retr function in ftpproto.c

Weakness: CWE-120

Which versions are affected by CVE-2021-40239?

It affects 1 product.

Products include Miniftpd Project Miniftpd.

How do I fix CVE-2021-40239?

No fix has been published for CVE-2021-40239 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-2021-40239 being exploited?

There is no known exploitation of CVE-2021-40239 in the wild and no public exploit code.

Sources

Also known as GHSA-x5r4-hffg-79fr.