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CVE-2023-21264

Status Candidate

Overview

In multiple functions of mem_protect.c, there is a possible way to access hypervisor memory due to a memory access check in the wrong place. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.

Related Files

Ubuntu Security Notice USN-6466-1
Posted Nov 13, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6466-1 - Hyunwoo Kim discovered that the DVB Core driver in the Linux kernel contained a race condition during device removal, leading to a use-after- free vulnerability. A physically proximate attacker could use this to cause a denial of service or possibly execute arbitrary code. Hyunwoo Kim discovered that the Technotrend/Hauppauge USB DEC driver in the Linux kernel did not properly handle device removal events. A physically proximate attacker could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2022-45886, CVE-2022-45887, CVE-2022-48425, CVE-2023-1206, CVE-2023-20569, CVE-2023-20588, CVE-2023-21264, CVE-2023-2156, CVE-2023-31083, CVE-2023-3212, CVE-2023-34319, CVE-2023-3772, CVE-2023-38427, CVE-2023-38430
SHA-256 | d231e9eb22491a28681d89631f3af4b06d452c694529f3f61e5a1f1f2333a3c8
Ubuntu Security Notice USN-6383-1
Posted Sep 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6383-1 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the ARM64 KVM implementation in the Linux kernel did not properly restrict hypervisor memory access. An attacker in a guest VM could use this to execute arbitrary code in the host OS.

tags | advisory, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-20588, CVE-2023-21264, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569
SHA-256 | c5be03314d6525a0dd88d31e6ba90e7d12a4b76d20a1e301e71a80a7805ade26
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