CVE-2020-36657

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-01-26 · updated 2026-06-17
Weakness: CWE-59

Description

uptimed before 0.4.6-r1 on Gentoo allows local users (with access to the uptimed user account) to gain root privileges by creating a hard link within the /var/spool/uptimed directory, because there is an unsafe chown -R call.

Affected products

Uptimed Project Uptimed: before 0.4.6 — fixed in 0.4.6

How to fix

Upgrade to a fixed version: Uptimed Project Uptimed 0.4.6. Check the vendor advisory for mitigations.

References

https://bugs.gentoo.org/630810
https://security.gentoo.org/glsa/202305-14
https://bugs.gentoo.org/630810
https://security.gentoo.org/glsa/202305-14

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