Link Following Affecting sudo package, versions <1.9.5-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.1% (42nd percentile)

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  • Snyk IDSNYK-ALPINE321-SUDO-8489411
  • published6 Dec 2024
  • disclosed12 Jan 2021

Introduced: 12 Jan 2021

CVE-2021-23240  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 sudo to version 1.9.5-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream sudo package and not the sudo package as distributed by Alpine. See How to fix? for Alpine:3.21 relevant fixed versions and status.

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.

CVSS Scores

version 3.1