An issue exists in Xen up to and including 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
xen xen |
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debian debian linux 10.0 |
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fedoraproject fedora 32 |
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fedoraproject fedora 33 |
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