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Vigil@nce - Linux kernel: infinite loop of pivot_root

October 2014 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

An attacker can generate an infinite loop in the pivot_root()
function of the Linux kernel, in order to trigger a denial of
service.

Impacted products: Linux

Severity: 1/4

Creation date: 09/10/2014

DESCRIPTION OF THE VULNERABILITY

The pivot_root() system call changes the file system root for the
current process.

However, if it is called with pivot_root(".", "."), when located
outside the chroot, a loop occurs.

An attacker can therefore generate an infinite loop in the
pivot_root() function 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-infinite-loop-of-pivot-root-15455


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