Palo Alto Networks Security Advisories / CVE-2017-6356

CVE-2017-6356 Information Disclosure in Terminal Services Agent

047910
Severity 5.3 · MEDIUM
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required NONE
User Interaction NONE
Scope UNCHANGED
Confidentiality Impact LOW
Integrity Impact NONE
Availability Impact NONE

Description

An information disclosure vulnerability exists in the Terminal Services (TS) agent. Session information may be disclosed due to insecure permissions (WINAGENT-43 / CVE-2017-6356).

The information disclosure is limited to session information.

This issue affects TS agent 6.0, TS agent 7.0, and TS agent 8.0.

Product Status

VersionsAffectedUnaffected
Terminal Services Agent 8.0None>= 8.0.1

Severity: MEDIUM

CVSSv3.1 Base Score: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)

Weakness Type

CWE-732 Incorrect Permission Assignment for Critical Resource

Solution

TS agent 8.0.1 and later releases.

We recommend customers use custom certificates when using the TS agent. Further details on using customer certificates can be reviewed at:

https://www.paloaltonetworks.com/documentation/80/pan-os/pan-os/user-id/configure-user-mapping-for-terminal-server-users.html

Workarounds and Mitigations

TS agent is fully backwards compatible with all currently supported versions of PAN-OS software. Customers using TS agents 6.0 and 7.0 can use TS agent 8.0.1.

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