Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:HID: multitouch: fix slab out-of-bounds access in mt_report_fixup()A malicious HID device can trigger a slab out-of-bounds duringmt_report_fixup() by passing in report descriptor smaller than607 bytes. mt_report_fixup() attempts to patch byte offset 607of the descriptor with 0x25 by first checking if byte offset607 is 0x15 however it lacks bounds checks to verify if thedescriptor is big enough before conducting this check. Fixthis bug by ensuring the descriptor size is at least 608bytes before accessing it.Below is the KASAN splat after the out of bounds access happens:[ 13.671954] ==================================================================[ 13.672667] BUG: KASAN: slab-out-of-bounds in mt_report_fixup+0x103/0x110[ 13.673297] Read of size 1 at addr ffff888103df39df by task kworker/0:1/10[ 13.673297][ 13.673297] CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.15.0-00005-gec5d573d83f4-dirty #3[ 13.673297] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/04[ 13.673297] Call Trace:[ 13.673297]
No PoCs from references.
- https://github.com/w4zu/Debian_security