UNIX Hard Link in app-misc/uptimed - CVE-2020-36657

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Main Vulnerability Database Vulnerabilities #VU75705

UNIX Hard Link in app-misc/uptimed - CVE-2020-36657

Published: May 3, 2023


Vulnerability identifier: #VU75705
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2020-36657
CWE-ID: CWE-62
Exploitation vector: Local access
Exploit availability: No public exploit available
Vulnerable software:
app-misc/uptimed
Software vendor:
Gentoo

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a hardlink following issue. A local user with access to the uptimed user account can create a specially crafted hard link within the /var/spool/uptimed directory and escalate privileges to root.


Remediation

Install updates from vendor's website.

External links