CVE-2023-34327 Affecting xen package, versions <4.17.2-r3
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Test your applications- Snyk ID SNYK-ALPINE320-XEN-7012572
- published 23 May 2024
- disclosed 5 Jan 2024
Introduced: 5 Jan 2024
CVE-2023-34327 Open this link in a new tabHow to fix?
Upgrade Alpine:3.20 xen to version 4.17.2-r3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Alpine.
See How to fix? for Alpine:3.20 relevant fixed versions and status.
[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.
CVE-2023-34327 - An HVM vCPU can end up operating in the context of a previous vCPUs debug mask state.
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.