CVE-2019-16905

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.

Affected products

Alt Linux, Openssh

Openbsd Openssh

≤ 7.9, 8.1

Fix

Available

CVSS 3.1

7.8 HIGH

EPSS

2.2% (81th percentile)

Weakness

CWE-190

NVD status

Modified

Published

2019-10-09