CVE-2021-23240
HIGHSudo < 1.9.5 - Unauthenticated Privilege Escalation via Symlink Attack in sudoedit
Title source: llmDescription
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.
References (8)
Core 8
Core References
Exploit, Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.suse.com/show_bug.cgi?id=CVE-2021-23240
Release Notes, Vendor Advisory x_refsource_confirm
https://www.sudo.ws/stable.html#1.9.5
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EE42Y35SMJOLONAIBNYNFC7J44UUZ2Y6/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMY4VSSBIND7VAYSN6T7XIWJRWG4GBB3/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202101-33
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210129-0010/
Mailing List mailing-list
x_refsource_mlist
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
Mailing List mailing-list
x_refsource_mlist
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Scores
CVSS v3
7.8
EPSS
0.0021
EPSS Percentile
43.0%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-59
Status
published
Products (5)
fedoraproject/fedora
32
fedoraproject/fedora
33
netapp/hci_management_node
netapp/solidfire
sudo_project/sudo
< 1.8.32
Published
Jan 12, 2021
Tracked Since
Feb 18, 2026