CVE-2015-3170 Denial of service in n/a
Local users can prevent SSH logins by creating a hardlink to /etc/passwd when protected hardlinks are disabled in SELinux policy.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2015-3170?
CVE-2015-3170 is a medium-severity denial of service vulnerability in n/a, published on 21 Jul 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
selinux-policy when sysctl fs.protected_hardlinks are set to 0 allows local users to cause a denial of service (SSH login prevention) by creating a hardlink to /etc/passwd from a directory named .config, and updating selinux-policy.
Weakness: CWE-254
Which versions are affected by CVE-2015-3170?
It affects 1 product.
Products include Selinux Project Selinux.
How do I fix CVE-2015-3170?
No fix has been published for CVE-2015-3170 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2015-3170 being exploited?
There is no known exploitation of CVE-2015-3170 in the wild and no public exploit code.
Sources
Also known as GHSA-m2mw-q7pj-g3wv.