CVE-2019-16905 Integer overflow in n/a

High 7.8 Published 9 Oct 2019 Updated 14 Oct 2026

An integer overflow in experimental XMSS key parsing allows local code execution, affecting OpenSSH installations with this non-default feature enabled.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2019-16905?

CVE-2019-16905 is a high-severity vulnerability in Netapp Cloud Backup, published on 9 Oct 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.

Weakness: CWE-190

Which versions are affected by CVE-2019-16905?

It affects 5 products.

Products include Netapp Cloud Backup, Netapp Steelstore Cloud Integrated Storage, OpenSSH, Siemens Scalance X204rna Ecc Firmware, Siemens Scalance X204rna Firmware.

How do I fix CVE-2019-16905?

Upgrade to a fixed version.

Is CVE-2019-16905 being exploited?

There is no known exploitation of CVE-2019-16905 in the wild and no public exploit code.

All Netapp Cloud Backup vulnerabilities

Sources

Also known as DEBIAN-CVE-2019-16905, GHSA-qw5m-v83j-4g26.