Vulnerability Description
In the Linux kernel before 5.2.3, drivers/block/floppy.c allows a denial of service by setup_format_params division-by-zero. Two consecutive ioctls can trigger the bug: the first one should set the drive geometry with .sect and .rate values that make F_SECT_PER_TRACK be zero. Next, the floppy format operation should be called. It can be triggered by an unprivileged local user even when a floppy disk has not been inserted. NOTE: QEMU creates the floppy device by default.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.2.3 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00056.html
- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackwar
- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LS
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LS
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.3Release NotesVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f3554PatchVendor Advisory
- https://github.com/torvalds/linux/commit/f3554aeb991214cbfafd17d55e2bfddb50282e3PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html
- https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html
- https://seclists.org/bugtraq/2019/Aug/13
- https://seclists.org/bugtraq/2019/Aug/18
- https://seclists.org/bugtraq/2019/Aug/26
- https://security.netapp.com/advisory/ntap-20190905-0002/
- https://usn.ubuntu.com/4114-1/
FAQ
What is CVE-2019-14284?
CVE-2019-14284 is a vulnerability with a CVSS score of 6.2 (MEDIUM). In the Linux kernel before 5.2.3, drivers/block/floppy.c allows a denial of service by setup_format_params division-by-zero. Two consecutive ioctls can trigger the bug: the first one should set the dr...
How severe is CVE-2019-14284?
CVE-2019-14284 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-14284?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.