VDB
CVE-2020-29486
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% · 19.2th percentile
Risk Scores
EPSS Score
0.06%
19.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | xen | 0, 4.5.1-0ubuntu2, 4.6.0-1ubuntu1 |
| Ubuntu:18.04:LTS | xen | 0, 4.9.0-0ubuntu4, 4.9.2-0ubuntu1 |
| Ubuntu:20.04:LTS | xen | 0, 4.9.2-0ubuntu2, 4.9.2-0ubuntu6 |
Exploit Intelligence
- https://xenbits.xenproject.org/xsa/advisory-352.html (circl)
- DSA-4812 (circl)
- FEDORA-2020-64859a826b (circl)
- FEDORA-2020-df772b417b (circl)
- GLSA-202107-30 (circl)
Timeline
- Dec 15, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-29486 third-party-advisory
- https://xenbits.xen.org/xsa/advisory-352.html third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-29486 third-party-advisory