CVE-2017-6356 Information Disclosure in Terminal Server Agent

Palo Alto Networks Security Advisories / CVE-2017-6356

CVE-2017-6356 Information Disclosure in Terminal Server Agent

Severity 5.3 · MEDIUM

Attack Vector NETWORK

Scope UNCHANGED

Attack Complexity LOW

Confidentiality Impact LOW

Privileges Required NONE

Integrity Impact NONE

User Interaction NONE

Availability Impact NONE

CVE JSON CSAF

Published 2017-03-15

Updated 2017-03-15

Reference PAN-SA-2017-0006

Description

An information disclosure vulnerability exists in the Terminal Server (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

Versions	Affected	Unaffected
Terminal Server Agent 8.0	None	>= 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.