CVE-2017-8390 Vulnerability in the PAN-OS DNS Proxy

Palo Alto Networks Security Advisories / CVE-2017-8390

CVE-2017-8390 Vulnerability in the PAN-OS DNS Proxy

Severity 9.8 · CRITICAL

Attack Vector NETWORK

Scope UNCHANGED

Attack Complexity LOW

Confidentiality Impact HIGH

Privileges Required NONE

Integrity Impact HIGH

User Interaction NONE

Availability Impact HIGH

CVE JSON

Published 2017-07-20

Updated 2017-07-20

Reference PAN-77516, PAN-SA-2017-0021

Description

A Remote Code Execution vulnerability exists in the PAN-OS DNS Proxy. This issue affects customers who have DNS Proxy enabled in PAN-OS. This issue affects both the Data and Management planes of the firewall. When DNS Proxy processes a specially crafted fully qualified domain names (FQDN), it is possible to execute code on the firewall. (ref # PAN-77516 / CVE-2017-8390).

Successful exploitation of this issue could allow an attacker to execute code on the firewall.

This issue affects PAN-OS 6.1.17 and earlier, PAN-OS 7.0.15 and earlier, PAN-OS 7.1.9 and earlier, PAN-OS 8.0.2 and earlier

Product Status

Versions	Affected	Unaffected
PAN-OS 8.0	<= 8.0.2	>= 8.0.3
PAN-OS 7.1	<= 7.1.9	>= 7.1.10
PAN-OS 7.0	<= 7.0.15	>= 7.0.16
PAN-OS 6.1	<= 6.1.17	>= 6.1.18

Severity: CRITICAL

CVSSv3.0 Base Score: 9.8 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Weakness Type

CWE-20 Improper Input Validation

Solution

PAN-OS 6.1.18 and later, PAN-OS 7.0.16 and later, PAN-OS 7.1.10 and later, PAN-OS 8.0.3 and later

Workarounds and Mitigations

Palo Alto Networks recommends disabling DNS Proxy for those customers who are affected and are unable to apply the update.