An issue exists in Xen up to and including 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
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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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