Total vulnerabilities in the database
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.
| Software | From | Fixed in |
|---|---|---|
| xen / xen | - | 4.14.0.x |
| debian / debian_linux | 10.0 | 10.0.x |
| fedoraproject / fedora | 32 | 32.x |
| fedoraproject / fedora | 33 | 33.x |