[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.
Metrics
Affected Vendors & Products
References
Link | Providers |
---|---|
https://xenbits.xenproject.org/xsa/advisory-444.html |
History
No history.
MITRE
Status: PUBLISHED
Assigner: XEN
Published: 2024-01-05T16:34:10.958Z
Updated: 2024-08-02T16:10:06.637Z
Reserved: 2023-06-01T10:44:17.066Z
Link: CVE-2023-34327
Vulnrichment
No data.
NVD
Status : Modified
Published: 2024-01-05T17:15:08.683
Modified: 2024-11-21T08:07:01.247
Link: CVE-2023-34327
Redhat
No data.