CVE-2020-29040 — Vulnetix

CVE-2020-29040 PUBLISHED

An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial of service (stack corruption), cause a data leak, or possibly gain privileges because of an off-by-one error. NOTE: this issue is caused by an incorrect fix for CVE-2020-27671.

EPSS 0.07% · 20.4th percentile

Risk Scores

EPSS Score

0.07%

20.4th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:16.04:LTS	xen	4.5.1-0ubuntu1, 4.5.1-0ubuntu2, 4.6.0-1ubuntu1
Ubuntu:18.04:LTS	xen	4.9.0-0ubuntu3, 4.9.0-0ubuntu4, 4.9.2-0ubuntu1
Ubuntu:20.04:LTS	xen	0, 4.9.2-0ubuntu2, 4.9.2-0ubuntu6

Exploit Intelligence

CIRCL seen: CVE-2020-29040 (circl-sighting)
http://xenbits.xen.org/xsa/advisory-355.html (circl)
https://xenbits.xen.org/xsa/advisory-355.html (circl)
[oss-security] 20210119 Xen Security Advisory 355 v3 (CVE-2020-29040) - stack corruption from XSA-346 change (circl)

Timeline

Nov 24, 2020 CVE Published
Nov 24, 2020 PoC 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

References

https://ubuntu.com/security/CVE-2020-29040 third-party-advisory
https://xenbits.xen.org/xsa/advisory-355.html third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2020-29040 third-party-advisory

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