CVEs-PoC/2019/CVE-2019-14284.md

CVE-2019-14284

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.

POC

Reference

• http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
• http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
• http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.3
• https://usn.ubuntu.com/4115-1/
• https://usn.ubuntu.com/4117-1/
• https://usn.ubuntu.com/4118-1/

Github

• https://github.com/ARPSyndicate/cvemon