CVE-2020-29570 — Vulnetix

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CVE-2020-29570 PUBLISHED

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.

EPSS 0.06% · 18.6th percentile

Risk Scores

EPSS Score

0.06%

18.6th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:16.04:LTS	xen	0, 4.5.1-0ubuntu1, 4.5.1-0ubuntu2
Ubuntu:20.04:LTS	xen	4.11.3+24-g14b62ab3e5-1ubuntu2.3, 4.9.2-0ubuntu7, 4.11.3+24-g14b62ab3e5-1ubuntu1
Ubuntu:18.04:LTS	xen	4.9.0-0ubuntu3, 4.9.0-0ubuntu4, 4.9.2-0ubuntu1

Timeline

Dec 15, 2020 CVE Published
Apr 14, 2021 EPSS Score
Jun 22, 2021 EPSS Score
Aug 23, 2021 EPSS Score
Oct 24, 2021 EPSS Score
Jan 6, 2022 EPSS Score
Feb 4, 2022 EPSS Score
Feb 25, 2022 EPSS Score
Apr 1, 2022 EPSS Score
Apr 28, 2022 EPSS Score
Jun 29, 2022 EPSS Score
Aug 31, 2022 EPSS Score

References

https://ubuntu.com/security/CVE-2020-29570 third-party-advisory
https://xenbits.xen.org/xsa/advisory-358.html third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2020-29570 third-party-advisory

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