CVE-2023-34327

Name
CVE-2023-34327
Description
[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.
NVD Severity
unknown
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
security@xen.org https://xenbits.xenproject.org/xsa/advisory-444.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* xen >= 4.5.0 <= None

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
xen 3.19-main 4.18.2-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
xen 3.18-main 4.17.4-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
xen 3.17-main 4.16.6-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
xen 3.16-main 4.16.6-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
xen 3.20-main 4.18.2-r1 Natanael Copa <ncopa@alpinelinux.org> fixed
xen edge-main 4.18.2-r2 Natanael Copa <ncopa@alpinelinux.org> fixed