CVE-2023-51713 Memory corruption in n/a

High 7.5 Published 22 Dec 2023 Updated 3 Nov 2025

A one-byte out-of-bounds read in ProFTPD allows attackers to crash the daemon via crafted FTP commands.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2023-51713?

CVE-2023-51713 is a high-severity memory corruption vulnerability in n/a, published on 22 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

make_ftp_cmd in main.c in ProFTPD before 1.3.8a has a one-byte out-of-bounds read, and daemon crash, because of mishandling of quote/backslash semantics.

Weakness: CWE-125

Which versions are affected by CVE-2023-51713?

It affects 1 product.

Linux distribution packages (1)

proftpd openSUSE:Tumbleweed All versions 1.3.8b-2.1

Products include Proftpd Proftpd.

How do I fix CVE-2023-51713?

Upgrade to a fixed version.

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

Is CVE-2023-51713 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-51713 exists.

Public exploit code: 1 Nuclei template.

Sources

Also known as DEBIAN-CVE-2023-51713, GHSA-6959-h9pv-vhf9, OESA-2024-1075, UBUNTU-CVE-2023-51713, openSUSE-SU-2024:13554-1.