CVE-2021-23240 — Vulnetix

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CVE-2021-23240 PUBLISHED

selinux_edit_copy_tfiles in sudoedit in Sudo before 1.9.5 allows a local unprivileged user to gain file ownership and escalate privileges by replacing a temporary file with a symlink to an arbitrary file target. This affects SELinux RBAC support in permissive mode. Machines without SELinux are not vulnerable.

EPSS 0.22% · 45.0th percentile

Risk Scores

EPSS Score

0.22%

45.0th percentile

Affected Products

Vendor	Product	Versions
Ubuntu:Pro:16.04:LTS	sudo	1.8.16-0ubuntu1.6, 1.8.16-0ubuntu1.9, 1.8.16-0ubuntu1.8
Ubuntu:Pro:18.04:LTS	sudo	1.8.21p2-3ubuntu1.6+esm1, 1.8.21p2-3ubuntu1.6, 1.8.21p2-3ubuntu1.5
Ubuntu:Pro:20.04:LTS	sudo	1.8.31-1ubuntu1.5+esm1, 0, 1.8.27-1ubuntu4
Ubuntu:Pro:14.04:LTS	sudo	1.8.9p5-1ubuntu1.3, 1.8.9p5-1ubuntu1.2, 1.8.9p5-1ubuntu1.1

Timeline

Jan 12, 2021 CVE Published
Apr 14, 2021 EPSS Score
Jun 22, 2021 EPSS Score
Aug 23, 2021 EPSS Score
Dec 25, 2021 EPSS Score
Jan 6, 2022 EPSS Score
Feb 4, 2022 EPSS Score
Feb 25, 2022 EPSS Score
Apr 1, 2022 EPSS Score
Jun 29, 2022 EPSS Score
Aug 31, 2022 EPSS Score
Nov 1, 2022 EPSS Score

References

https://ubuntu.com/security/CVE-2021-23240 third-party-advisory
https://www.openwall.com/lists/oss-security/2021/01/11/2 third-party-advisory
https://www.sudo.ws/alerts/sudoedit_selinux.html third-party-advisory
https://www.cve.org/CVERecord?id=CVE-2021-23240 third-party-advisory

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