CVE-2018-14617: Null Pointer Dereference
First published: Fri Jul 27 2018(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <=4.17.10 | |
| Debian Linux | =8.0 | |
| Debian Linux | =9.0 | |
| Ubuntu | =14.04 | |
| Ubuntu | =16.04 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.133-1 6.12.21-1 6.12.22-1 |
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Reference Links
- http://www.securityfocus.com/bid/104917
- https://bugzilla.kernel.org/show_bug.cgi?id=200297
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html
- https://usn.ubuntu.com/3821-1/
- https://usn.ubuntu.com/3821-2/
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4118-1/
- https://www.debian.org/security/2018/dsa-4308
- https://www.spinics.net/lists/linux-fsdevel/msg130021.html
- https://launchpad.net/bugs/cve/CVE-2018-14617
- https://security-tracker.debian.org/tracker/CVE-2018-14617
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-14617
- https://nvd.nist.gov/vuln/detail/CVE-2018-14617
- https://ubuntu.com/security/CVE-2018-14617
Frequently Asked Questions
What is the severity of CVE-2018-14617?
CVE-2018-14617 has a moderate severity rating due to the potential for a NULL pointer dereference leading to a kernel panic.
How do I fix CVE-2018-14617?
To fix CVE-2018-14617, update the Linux kernel to version 5.10.223-1 or later.
Which versions of Linux are affected by CVE-2018-14617?
CVE-2018-14617 affects Linux kernel versions up to and including 4.17.10 and several versions of Debian and Ubuntu Linux.
What happens if CVE-2018-14617 is exploited?
If exploited, CVE-2018-14617 may result in a kernel panic, causing the system to become unresponsive.
Is CVE-2018-14617 specific to any filesystem?
Yes, CVE-2018-14617 is specific to the hfs+ filesystem when dealing with malformed catalog data.
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