CVE-2018-10933: Canonical Ubuntu Linux

Critical severity, CVSS 9.1. EPSS: 91.8% chance of exploitation in the next 30 days.

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only; version 18.10 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• Libssh Libssh: from 0.6.0, before 0.7.6 (fixed in 0.7.6); from 0.8.0, before 0.8.4 (fixed in 0.8.4)
• Netapp Oncommand Unified Manager: from 7.3; from 9.4
• Netapp Oncommand Workflow Automation: affected versions not specified
• Netapp Snapcenter: affected versions not specified
• Netapp Storage Automation Store: affected versions not specified
• Oracle MySQL Workbench: up to and including 8.0.13
• Red Hat Enterprise Linux: version 7.0 only

Published 2018-10-17. Last modified 2026-06-17.