Cyber Resilience

CVE-2021-23240

HighPublic PoC

Published: 12 January 2021

Published
12 January 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0021 43.3th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-23240 is a high-severity Link Following (CWE-59) vulnerability in Sudo Project Sudo. Its CVSS base score is 7.8 (High).

Operationally, ranked at the 43.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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.…

more

Machines without SELinux are not vulnerable.

CWE(s)
CWE-59

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

sudo project
sudo
≤ 1.8.32 · 1.9.0 — 1.9.5
netapp
hci management node
all versions
netapp
solidfire
all versions
fedoraproject
fedora
32, 33

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References