CVE-2021-23240

Published: Jan 12, 2021Modified: Jun 17, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

Description

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.

Affected (6)

Products: Sudo Project: Sudo · Netapp: Hci Management Node, Solidfire · Fedoraproject: Fedora

1 product

2 products

Hci Management Node

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Sudo Project Sudo	Before 1.8.32
Sudo Project Sudo	From 1.9.0 to 1.9.5

Configuration B

2 vulnerable

Vulnerable Software	Affected Versions
Netapp Hci Management Node	All versions
Netapp Solidfire	All versions

Configuration C

2 vulnerable

Vulnerable Software	Affected Versions
Fedoraproject Fedora	Version 32
Fedoraproject Fedora	Version 33

Related CWEs

Improper Link Resolution Before File Access ('Link Following')

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

References (16)

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240

Source: cve@mitre.org

ExploitIssue TrackingPatchThird Party Advisory

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

Source: cve@mitre.org

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/

Source: cve@mitre.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/

Source: cve@mitre.org

https://security.gentoo.org/glsa/202101-33

Source: cve@mitre.org

Third Party Advisory

https://security.netapp.com/advisory/ntap-20210129-0010/

Source: cve@mitre.org

Third Party Advisory

https://www.sudo.ws/stable.html#1.9.5

Source: cve@mitre.org

Release NotesVendor Advisory

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitIssue TrackingPatchThird Party Advisory

https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/

Source: af854a3a-2127-422b-91ae-364da2661108

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/

Source: af854a3a-2127-422b-91ae-364da2661108

https://security.gentoo.org/glsa/202101-33

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://security.netapp.com/advisory/ntap-20210129-0010/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

https://www.sudo.ws/stable.html#1.9.5

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

Timeline

No history available yet.