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Vigil@nce - OpenSSH: access to /proc via SFTP

October 2014 by Vigil@nce

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

SYNTHESIS OF THE VULNERABILITY

An authenticated attacker can read the /proc/self/maps file via
SFTP of OpenSSH, in order to obtain sensitive information, or he
can also write in the /proc/self/mem file to alter the memory
content.

Impacted products: OpenSSH

Severity: 2/4

Creation date: 08/10/2014

DESCRIPTION OF THE VULNERABILITY

The OpenSSH product offers a SFTP service, which is used to read
or create files.

However, the SFTP service does not forbid access to /proc files.

An authenticated attacker can therefore read the /proc/self/maps
file via SFTP of OpenSSH, in order to obtain sensitive
information, or he can also write in the /proc/self/mem file to
alter the memory content.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/OpenSSH-access-to-proc-via-SFTP-15447


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