CVE-2015-1328
HighSummary
The overlayfs implementation in the Linux kernel before version 3.19.0-21.21 in Ubuntu through 15.04 does not properly check permissions for file creation in the upper filesystem directory. This allows local users to gain root access by leveraging a configuration where overlayfs is permitted in an arbitrary mount namespace.
Risk Assessment
The organization may be exposed to unauthorized root access by local users, potentially leading to serious security breaches and data loss.
Recommendation
It is recommended to update the Linux kernel to version 3.19.0-21.21 or later to mitigate this vulnerability and review the overlayfs configuration in the system.
Other vulnerabilities in overlayfs w jądrze Linux
Original NVD description (English source)
The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does not properly check permissions for file creation in the upper filesystem directory, which allows local users to obtain root access by leveraging a configuration in which overlayfs is permitted in an arbitrary mount namespace.