CVE-2018-14617 Null dereference in n/a
A local attacker can cause a system crash by mounting a malformed HFS+ filesystem read-only, triggering a NULL pointer dereference in the Linux kernel.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-14617?
CVE-2018-14617 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 27 Jul 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An issue was discovered in the Linux kernel through 4.17.10. There is a NULL pointer dereference and panic in hfsplus_lookup() in fs/hfsplus/dir.c when opening a file (that is purportedly a hard link) in an hfs+ filesystem that has malformed catalog data, and is mounted read-only without a metadata directory.
Weakness: CWE-476
Which versions are affected by CVE-2018-14617?
It affects 3 products.
Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel.
How do I fix CVE-2018-14617?
Apply the vendor's patch.
Is CVE-2018-14617 being exploited?
There is no known exploitation of CVE-2018-14617 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2018-14617, GHSA-qwp3-c8jm-p6v6, UBUNTU-CVE-2018-14617.