CVE-2011-1075 Race condition in FreeBSD/crontab

Low 3.7 Published 19 Oct 2021 Updated 6 Aug 2024

A race condition in FreeBSD's crontab allows attackers to bypass read permissions during MD5 checks, potentially leading to privilege escalation.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2011-1075?

CVE-2011-1075 is a low-severity vulnerability in Freebsd Freebsd, published on 19 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

FreeBSD's crontab calculates the MD5 sum of the previous and new cronjob to determine if any changes have been made before copying the new version in. In particular, it uses the MD5File() function, which takes a pathname as an argument, and is called with euid 0. A race condition in this process may lead to an arbitrary MD5 comparison regardless of the read permissions.

Weakness: CWE-362

Which versions are affected by CVE-2011-1075?

It affects 1 product.

Products include Freebsd Freebsd.

How do I fix CVE-2011-1075?

No fix has been published for CVE-2011-1075 yet. Limit exposure of the affected software until one is available.

Is CVE-2011-1075 being exploited?

There is no known exploitation of CVE-2011-1075 in the wild and no public exploit code.

All Freebsd Freebsd vulnerabilities

Sources

Also known as GHSA-w6qf-5w3x-wj7f.