A flaw was found in MRTG. When the MRTG daemon is started as a root user and subsequently drops privileges, a local, low-privileged attacker can exploit a symbolic link (symlink) following vulnerability. By influencing or pre-placing a symlink in the process ID (PID) file path, the attacker can trick the root process into changing the ownership of an arbitrary existing file to the daemon user. This can lead to local privilege escalation, allowing unauthorized access to or modification of sensitive files.
CVSS Details
- CVSS 3.1 Base Score: 7.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade mrtg | Oct 11, 2026 | Aug 20, 2026 |
| Amazon Linux Ami 2 | — | Upgrade mrtg-debuginfoUpgrade mrtg | Oct 19, 2026 | Oct 19, 2026 |
| Debian | — | Upgrade mrtg | Sep 21, 2026 | Aug 11, 2026 |
| Oracle_linux | — | Upgrade mrtgUpgrade mrtg-selinux | Oct 22, 2026 | Aug 11, 2026 |
| Redhat_linux | — | No solution existsUpgrade mrtg-selinuxUpgrade mrtgUpgrade mrtg-debugsourceUpgrade mrtg-debuginfo | Aug 12, 2026 | Aug 11, 2026 |
| Rocky_linux | — | Upgrade mrtgUpgrade mrtg-debugsourceUpgrade mrtg-debuginfo | Aug 24, 2026 | Aug 21, 2026 |
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