CVE-2018-17159
First published: Tue Dec 04 2018(Updated: )
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.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | <11.2 | |
| FreeBSD Kernel | =11.2-p5 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2018-17159?
CVE-2018-17159 is classified as a high severity vulnerability due to its potential for resource exhaustion on the NFS server.
How do I fix CVE-2018-17159?
To fix CVE-2018-17159, upgrade to FreeBSD version 11.2-STABLE(r340854) or later, or the patched version 11.2-RELEASE-p5.
Who is affected by CVE-2018-17159?
CVE-2018-17159 affects FreeBSD systems before version 11.2-STABLE(r340854) and 11.2-RELEASE-p5, where NFS server is in use.
What can exploit CVE-2018-17159?
Unprivileged remote users with access to the NFS server can exploit CVE-2018-17159 by sending crafted READDIRPLUS requests.
What type of attack can be performed using CVE-2018-17159?
An attacker can perform a denial-of-service attack by forcing the NFS server to allocate excessive memory, leading to resource exhaustion.
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