#VU59125 Out-of-bounds read in Linux kernel - CVE-2020-36386
Published: December 30, 2021
Vulnerability identifier: #VU59125
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-36386
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a boundary condition within the hci_extended_inquiry_result_evt() function in Linux kernel. A local user can tun a specially crafted program to trigger an out-of-bounds read error and read contents of memory on the system or crash the kernel.
Remediation
Install updates from vendor's website.
External links
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.1
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=51c19bf3d5cfaa66571e4b88ba2a6f6295311101
- https://syzkaller.appspot.com/text?tag=ReproC&x=15ca2f46900000
- https://sites.google.com/view/syzscope/kasan-slab-out-of-bounds-read-in-hci_extended_inquiry_result_evt
- https://syzkaller.appspot.com/bug?id=4bf11aa05c4ca51ce0df86e500fce486552dc8d2