CVE-2020-27187

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: none known
Published: 2020-10-26 · updated 2026-06-17

Description

An issue was discovered in KDE Partition Manager 4.1.0 before 4.2.0. The kpmcore_externalcommand helper contains a logic flaw in which the service invoking D-Bus is not properly checked. An attacker on the local machine can replace /etc/fstab, and execute mount and other partitioning related commands, while KDE Partition Manager is running. the mount command can then be used to gain full root privileges.

Affected products

KDE Partition Manager: from 4.1.0 before 4.2.0 — fixed in 4.2.0

How to fix

Upgrade to a fixed version: KDE Partition Manager 4.2.0. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1890199
https://github.com/KDE/partitionmanager/compare/v4.1.0...v4.2.0
https://kde.org/info/security/advisory-20201017-1.txt
https://security.gentoo.org/glsa/202011-03
https://bugzilla.redhat.com/show_bug.cgi?id=1890199
https://github.com/KDE/partitionmanager/compare/v4.1.0...v4.2.0
https://kde.org/info/security/advisory-20201017-1.txt
https://security.gentoo.org/glsa/202011-03

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