Vigil@nce - Linux kernel: privilege escalation via Userfaultfd Sparse Tmpfs Files Write
February 2019 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer...
SYNTHESIS OF THE VULNERABILITY
Impacted products: Linux, openSUSE Leap, RHEL, SUSE Linux Enterprise Desktop, SLES.
Consequences: privileged access/rights, data creation/edition.
Provenance: user shell.
Confidence: confirmed by the editor (5/5).
Creation date: 12/12/2018.
DESCRIPTION OF THE VULNERABILITY
An attacker can bypass restrictions via Userfaultfd Sparse Tmpfs Files Write of the Linux kernel, in order to escalate his privileges.
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