CVE-2019-3461 Race condition in tmpreaper

What is CVE-2019-3461?

CVE-2019-3461 is a high-severity vulnerability in Debian Debian Linux, published on 4 Feb 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Debian tmpreaper version 1.6.13+nmu1 has a race condition when doing a (bind) mount via rename() which could result in local privilege escalation. Mounting via rename() could potentially lead to a file being placed elsewhereon the filesystem hierarchy (e.g. /etc/cron.d/) if the directory being cleaned up was on the same physical filesystem. Fixed versions include 1.6.13+nmu1+deb9u1 and 1.6.14.

Weakness: CWE-362

Which versions are affected by CVE-2019-3461?

It affects 2 products.

Products include Debian Debian Linux, Debian Tmpreaper.

How do I fix CVE-2019-3461?

Upgrade to a fixed version.

Is CVE-2019-3461 being exploited?

There is no known exploitation of CVE-2019-3461 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-3461, DLA-1640-1, DSA-4365-1, GHSA-qwp6-cgv8-84vv, UBUNTU-CVE-2019-3461, USN-4077-1.