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Vigil@nce - Linux kernel: bypassing limits via Unix Domain Socket

March 2016 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can use a Unix socket on the Linux kernel, in order to
bypass file descriptor resource limits.

 Impacted products: Debian, Fedora, Linux.
 Severity: 1/4.
 Creation date: 23/02/2016.

DESCRIPTION OF THE VULNERABILITY

Resource limits can be defined for each process.

However, file descriptors which are transmitted via a Unix socket
are not counted.

An attacker can therefore use a Unix socket on the Linux kernel,
in order to bypass file descriptor resource limits.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Linux-kernel-bypassing-limits-via-Unix-Domain-Socket-19004


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