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 Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Partition_manager | Kde | 4.1.0 (including) | 4.2.0 (excluding) |
| Kpmcore | Ubuntu | bionic | * |
| Kpmcore | Ubuntu | focal | * |
| Kpmcore | Ubuntu | groovy | * |
| Kpmcore | Ubuntu | trusty | * |
| Kpmcore | Ubuntu | upstream | * |
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