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computer vulnerability bulletin 21618

Samba: privilege escalation via DENY rules for file access

Synthesis of the vulnerability

An attacker can access to files served by Samba and protected by DENY rules.
Impacted products: Samba.
Severity: 2/4.
Creation date: 18/01/2017.
Identifiers: VIGILANCE-VUL-21618.

Description of the vulnerability

The Samba product offers a file server.

However, access rules of type DENY are now rightly processed when applied to the special SSID S-1-3-4.

An attacker can therefore access to files served by Samba and protected by DENY rules.
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