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Vigil@nce - Linux kernel: buffer overflow of ecryptfs_decode_from_filename

March 2015 by Marc Jacob

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

SYNTHESIS OF THE VULNERABILITY

An attacker can generate a buffer overflow in the
ecryptfs_decode_from_filename() function of the Linux kernel, in
order to trigger a denial of service, and possibly to execute code.

Impacted products: Debian, Linux, Ubuntu

Severity: 2/4

Creation date: 18/02/2015

DESCRIPTION OF THE VULNERABILITY

The eCryptfs filesystem is used to encrypt data.

However, if a file name is special, an overflow of one byte occurs
in the ecryptfs_decode_from_filename() function.

An attacker can therefore generate a buffer overflow in the
ecryptfs_decode_from_filename() function of the Linux kernel, in
order to trigger a denial of service, and possibly to execute code.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Linux-kernel-buffer-overflow-of-ecryptfs-decode-from-filename-16211


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