Vigil@nce - Linux kernel: denial of service via keyctl_read_key
January 2016 by Vigil@nce
This bulletin was written by Vigil@nce : http://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
A local attacker can generate a locking error in keyctl_read_key()
of the Linux kernel, in order to trigger a denial of service.
– Impacted products: Debian, Fedora, Linux.
– Severity: 1/4.
– Creation date: 22/12/2015.
DESCRIPTION OF THE VULNERABILITY
The Linux kernel can store cryptographic keys, which are managed
using keyctl.
However, if a key is read during its revocation, a fatal error
occurs in the keyctl_read_key() function.
A local attacker can therefore generate a locking error in
keyctl_read_key() of the Linux kernel, in order to trigger a
denial of service.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
http://vigilance.fr/vulnerability/Linux-kernel-denial-of-service-via-keyctl-read-key-18577