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Palo Alto Networks PAN-OS HTTP Header Handling URL Filter Bypass (PAN-SA-2016-0006)

medium Nessus Plugin ID 90775

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Synopsis

The remote host is affected by a security bypass vulnerability.

Description

The Palo Alto Networks PAN-OS running on the remote host is version 5.0.x, 6.0.x, 6.1.x, 7.0.x, or 7.1.x prior to 7.1.1. It is, therefore, affected by a security bypass vulnerability in the URL filtering mechanism, which is triggered when handling a specially crafted HTTP header. An attacker can exploit this, via a specially crafted header, to evade URL filtering, potentially allowing a violation of the intended firewall rule base.

Solution

Upgrade to Palo Alto Networks PAN-OS version 7.1.1 or later, which includes additional inspection for HTTP application identification and URL categorization. Enforcement of this verification is enabled using new threat signatures #14984 for HTTP and #14978 for TLS. Note that PAN-OS must be upgraded to 7.1.1 in order for these new threat signatures to be enabled.

See Also

https://securityadvisories.paloaltonetworks.com/Home/Detail/39

Plugin Details

Severity: Medium

ID: 90775

File Name: palo_alto_PAN-SA-2016-0006.nasl

Version: 1.5

Type: combined

Published: 4/28/2016

Updated: 8/8/2018

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Vulnerability Information

CPE: cpe:/o:paloaltonetworks:pan-os

Required KB Items: Host/Palo_Alto/Firewall/Version, Host/Palo_Alto/Firewall/Full_Version

Patch Publication Date: 4/18/2016

Vulnerability Publication Date: 4/18/2016