CVE-2021-33393: Ipfire

High severity, CVSS 8.8. EPSS: 59.6% chance of exploitation in the next 30 days.

lfs/backup in IPFire 2.25-core155 does not ensure that /var/ipfire/backup/bin/backup.pl is owned by the root account. It might be owned by an unprivileged account, which could potentially be used to install a Trojan horse backup.pl script that is later executed by root. Similar problems with the ownership/permissions of other files may be present as well.

Affected products

• Ipfire Ipfire: before 2.25 (fixed in 2.25); version 2.25 only

Published 2021-06-09. Last modified 2026-06-17.