An issue was discovered in Xen through 4.14.x. Access rights of Xenstore nodes are per domid. Unfortunately, existing granted access rights are not removed when a domain is being destroyed. This means that a new domain created with the same domid will inherit the access rights to Xenstore nodes from the previous domain(s) with the same domid. Because all Xenstore entries of a guest below /local/domain/<domid> are being deleted by Xen tools when a guest is destroyed, only Xenstore entries of other guests still running are affected. For example, a newly created guest domain might be able to read sensitive information that had belonged to a previously existing guest domain. Both Xenstore implementations (C and Ocaml) are vulnerable.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-12-15T17:51:24

Updated: 2024-08-04T16:55:09.959Z

Reserved: 2020-12-03T00:00:00

Link: CVE-2020-29481

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-12-15T18:15:15.067

Modified: 2023-11-07T03:21:30.750

Link: CVE-2020-29481

cve-icon Redhat

No data.