Actu
Vigil@nce - Linux kernel: out-of-bounds memory reading via ip6gre_err
April 2017 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can force a read at an invalid address via
ip6gre_err() on the Linux kernel, in order to trigger a denial of
service, or to obtain sensitive information.
Impacted products: Debian, Fedora, Linux, openSUSE Leap, SUSE
Linux Enterprise Desktop, SLES.
Severity: 2/4.
Creation date: 06/02/2017.
DESCRIPTION OF THE VULNERABILITY
The Linux kernel support GRE (Generic Routing Encapsulation)
tunnels overs IPv6.
However, the ip6gre_err() function tries to read a memory area
located outside the expected range, which triggers a fatal error,
or leads to the disclosure of a memory fragment.
An attacker can therefore force a read at an invalid address via
ip6gre_err() on the Linux kernel, in order to trigger a denial of
service, or to obtain sensitive information.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Linux-kernel-out-of-bounds-memory-reading-via-ip6gre-err-21764
