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CVE-2020-29486 PUBLISHED

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.

EPSS 0.06% · 18.9th percentile

Risk Scores

EPSS Score
0.06%
18.9th percentile

Affected Products

VendorProductVersions
Ubuntu:16.04:LTSxen0, 4.5.1-0ubuntu1, 4.5.1-0ubuntu2
Ubuntu:18.04:LTSxen0, 4.9.0-0ubuntu3, 4.9.0-0ubuntu4
Ubuntu:20.04:LTSxen0, 4.9.2-0ubuntu2, 4.9.2-0ubuntu6

Timeline

References

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