CVE-2018-17159 Denial of service in FreeBSD
Remote unprivileged users can cause resource exhaustion and denial of service on FreeBSD NFS servers via a missing bounds check in READDIRPLUS requests.
- 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-2018-17159?
CVE-2018-17159 is a high-severity denial of service vulnerability in Freebsd Freebsd, published on 4 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In FreeBSD before 11.2-STABLE(r340854) and 11.2-RELEASE-p5, the NFS server lacks a bounds check in the READDIRPLUS NFS request. Unprivileged remote users with access to the NFS server can cause a resource exhaustion by forcing the server to allocate an arbitrarily large memory allocation.
Weakness: CWE-400
Which versions are affected by CVE-2018-17159?
It affects 1 product.
Products include Freebsd Freebsd.
How do I fix CVE-2018-17159?
No fix has been published for CVE-2018-17159 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-2018-17159 being exploited?
There is no known exploitation of CVE-2018-17159 in the wild and no public exploit code.
Other vulnerabilities in Freebsd Freebsd
Sources
Also known as GHSA-cfxc-v7ff-27xq.