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CVE-2023-34328

Status Candidate

Overview

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] AMD CPUs since ~2014 have extensions to normal x86 debugging functionality. Xen supports guests using these extensions. Unfortunately there are errors in Xen's handling of the guest state, leading to denials of service. 1) CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state. 2) CVE-2023-34328 - A PV vCPU can place a breakpoint over the live GDT. This allows the PV vCPU to exploit XSA-156 / CVE-2015-8104 and lock up the CPU entirely.

Related Files

Gentoo Linux Security Advisory 202409-10
Posted Sep 23, 2024
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202409-10 - Multiple vulnerabilities have been discovered in Xen, the worst of which could lead to privilege escalation. Versions greater than or equal to 4.17.4 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
advisories | CVE-2022-42336, CVE-2022-4949, CVE-2023-28746, CVE-2023-34319, CVE-2023-34320, CVE-2023-34321, CVE-2023-34322, CVE-2023-34323, CVE-2023-34324, CVE-2023-34325, CVE-2023-34327, CVE-2023-34328, CVE-2023-46835, CVE-2023-46836
SHA-256 | 8b158b4b14fabb37b107389483696ee806809c7a28b87657efca564110fdb8a3
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