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Vulnerability of Linux kernel: information disclosure via /proc/pid/stat

Synthesis of the vulnerability 

An attacker can bypass access restrictions to data via /proc/pid/stat of the Linux kernel, in order to obtain sensitive information.
Impacted systems: Linux.
Severity of this alert: 1/4.
Creation date: 13/12/2019.
Références of this alert: VIGILANCE-VUL-31151, ZDI-19-1012.

Description of the vulnerability 

An attacker can bypass access restrictions to data via /proc/pid/stat of the Linux kernel, in order to obtain sensitive information.
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This security vulnerability impacts software or systems such as Linux.

Our Vigil@nce team determined that the severity of this computer weakness bulletin is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this security note.

Solutions for this threat 

Linux kernel: workaround for /proc/pid/stat.
A workaround is to use the hidepid option of mount.
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