CVE-2018-18654: Debian Crossroads

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Crossroads 2.81 does not properly handle the /tmp directory during a build of xr. A local attacker can first create a world-writable subdirectory in a certain location under the /tmp directory, wait until a user process copies xr there, and then replace the entire contents of this subdirectory to include a Trojan horse xr.

Affected products

• Debian Crossroads: version 2.81 only

Published 2018-10-26. Last modified 2026-06-17.