Vigil@nce - Linux kernel: buffer overflow via proc_keys_show
December 2016 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can generate a buffer overflow via proc_keys_show() of
the Linux kernel, in order to trigger a denial of service, and
possibly to run code.
– Impacted products: Debian, Linux, openSUSE, openSUSE Leap, SUSE
Linux Enterprise Desktop, SLES, Ubuntu.
– Severity: 2/4.
– Creation date: 14/10/2016.
DESCRIPTION OF THE VULNERABILITY
The Linux kernel provides the /proc/keys interface to access to
cryptographic keys.
However, if the size of data is greater than the size of the
storage array, an overflow occurs in proc_keys_show().
An attacker can therefore generate a buffer overflow via
proc_keys_show() of the Linux kernel, in order to trigger a denial
of service, and possibly to run code.
ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/Linux-kernel-buffer-overflow-via-proc-keys-show-20868