CVE-2017-12836: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 6.4% chance of exploitation in the next 30 days.

CVS 1.12.x, when configured to use SSH for remote repositories, might allow remote attackers to execute arbitrary code via a repository URL with a crafted hostname, as demonstrated by "-oProxyCommand=id;localhost:/bar."

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 17.04 only
• Debian Debian Linux: version 8.0 only; version 9.0 only
• GNU Cvs: version 1.12.1 only; version 1.12.3 only; version 1.12.5 only; version 1.12.6 only; version 1.12.7 only; version 1.12.9 only; …

Published 2017-08-24. Last modified 2026-06-17.