CVE-2017-18594 Memory corruption in n/a

High 7.5 Published 28 Aug 2019 Updated 5 Aug 2024

A double free vulnerability in Nmap's SSH brute-force scripts allows remote attackers to cause a denial of service via crafted input.

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

What is CVE-2017-18594?

CVE-2017-18594 is a high-severity memory corruption vulnerability in n/a, published on 28 Aug 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

nse_libssh2.cc in Nmap 7.70 is subject to a denial of service condition due to a double free when an SSH connection fails, as demonstrated by a leading \n character to ssh-brute.nse or ssh-auth-methods.nse.

Weakness: CWE-415

Which versions are affected by CVE-2017-18594?

It affects 1 product.

Linux distribution packages (1)

nmap openSUSE:Tumbleweed All versions 7.92-4.1

Products include Nmap Nmap.

How do I fix CVE-2017-18594?

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-2017-18594 being exploited?

There is no known exploitation of CVE-2017-18594 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2017-18594, DEBIAN-CVE-2017-18594, GHSA-mh4c-hqr8-mc3f, MGASA-2020-0216, UBUNTU-CVE-2017-18594, openSUSE-SU-2024:11750-1.