Security restrictions bypass in kpmcore - CVE-2020-27187
Published: October 18, 2020
Vulnerability identifier: #VU47699
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-2020-27187
CWE-ID: CWE-264
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 logic flaw within the kpmcore_externalcommand helper when the service that invokes dbus is not properly checked. A local user can replace /etc/fstab file, execute mount and other partitioning related commands while KDE Partition Manager is running, and gain root privileges on the system.
Affected software
kpmcore
Arch Linux
Gentoo Linux
Fedora
kpmcore (Alpine package)
calamares
kde-partitionmanager
kpmcore
Arch Linux
Gentoo Linux
Fedora
kpmcore (Alpine package)
calamares
kde-partitionmanager
kpmcore
How to mitigate CVE-2020-27187
Install updates from vendor's website.
kpmcore - update to 4.2.0
calamares - update to 3.2.11-14.fc33
kde-partitionmanager - update to 4.2.0-1.fc33
kpmcore - update to 4.2.0-1.fc33
calamares - update to 3.2.11-14.fc33
kde-partitionmanager - update to 4.2.0-1.fc33
kpmcore - update to 4.2.0-1.fc33