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Vulnerability of Juniper Junos: privilege escalation via pam.conf

Synthesis of the vulnerability 

A local attacker can wait for the corruption of the pam.conf file of Juniper Junos, in order to escalate his privileges.
Vulnerable software: Juniper J-Series, Junos OS.
Severity of this announce: 2/4.
Creation date: 15/10/2015.
Références of this computer vulnerability: CERTFR-2015-AVI-431, CVE-2015-7751, JSA10707, VIGILANCE-VUL-18109.

Description of the vulnerability 

The pam.conf file indicates the configuration of Pluggable Authentication Modules.

However, during a normal usage, this file can be corrupted. The root user can thus authenticate without entering a password.

A local attacker can therefore wait for the corruption of the pam.conf file of Juniper Junos, in order to escalate his privileges.
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This computer threat note impacts software or systems such as Juniper J-Series, Junos OS.

Our Vigil@nce team determined that the severity of this weakness alert is medium.

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 computer weakness note.

Solutions for this threat 

Juniper Junos: fixed versions for pam.conf.
Fixed versions are indicated in information sources.
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