UNIX Hard Link in app-misc/uptimed - CVE-2020-36657
Published: May 3, 2023
Vulnerability identifier: #VU75705
CSH Severity: Low
CVSS v4: 8.5 [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]
CVE-ID: CVE-2020-36657
CWE-ID: CWE-62
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
app-misc/uptimed
Gentoo Linux
Gentoo Linux
How to mitigate CVE-2020-36657
Install updates from vendor's website.
app-misc/uptimed - update to 0.4.6-r1