An issue was discovered in Xen through 4.14.x. Nodes in xenstore have an ownership. In oxenstored, a owner could give a node away. However, node ownership has quota implications. Any guest can run another guest out of quota, or create an unbounded number of nodes owned by dom0, thus running xenstored out of memory A malicious guest administrator can cause a denial of service against a specific guest or against the whole host. All systems using oxenstored are vulnerable. Building and using oxenstored is the default in the upstream Xen distribution, if the Ocaml compiler is available. Systems using C xenstored are not vulnerable.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2020-12-15T18:00:47

Updated: 2024-08-04T16:55:09.950Z

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

Link: CVE-2020-29486

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-12-15T18:15:15.567

Modified: 2024-11-21T05:24:05.500

Link: CVE-2020-29486

cve-icon Redhat

No data.