Palo Alto PAN-OS HTTP Header Evasion Vulnerability (PAN-SA-2016-0006)

# SPDX-FileCopyrightText: 2016 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/o:paloaltonetworks:pan-os";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105628");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_version("2026-04-28T06:28:06+0000");

  script_name("Palo Alto PAN-OS HTTP Header Evasion Vulnerability (PAN-SA-2016-0006)");

  script_xref(name:"URL", value:"https://security.paloaltonetworks.com/PAN-SA-2016-0006");

  script_tag(name:"summary", value:"An evasion was identified whereby a user could specially craft an HTTP header
  to evade URL filtering on Palo Alto Networks firewalls.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
  script_tag(name:"solution", value:"Customers concerned with this evasion technique are advised to upgrade to PAN-OS
  7.1.1 and to enable threat signatures #14984 and #14978.");

  script_tag(name:"impact", value:"The HTTP header evasion technique can be used by a malicious insider to bypass URL
  filtering policy. It is not a product vulnerability that affects the security or integrity of the firewall itself.");

  script_tag(name:"affected", value:"PAN-OS releases 5.0.X, 6.0.X, 6.1.X, 7.0.X and 7.1.0.");
  script_tag(name:"solution_type", value:"VendorFix");

  script_tag(name:"qod_type", value:"package");

  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2016-04-29 12:00:28 +0200 (Fri, 29 Apr 2016)");
  script_category(ACT_GATHER_INFO);
  script_family("Palo Alto PAN-OS Local Security Checks");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_dependencies("gb_paloalto_panos_consolidation.nasl");
  script_mandatory_keys("palo_alto_pan_os/version");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if( ! version = get_app_version( cpe:CPE, nofork:TRUE ) ) exit( 0 );

model = get_kb_item( "palo_alto_pan_os/model" );

if( version_in_range( version:version, test_version:"5.0", test_version2:"7.1.0" ) ) fix = '7.1.1';

if( fix )
{
  report = 'Installed version: ' + version + '\n' +
           'Fixed version:     ' + fix;

  if( model )
    report += '\nModel:             ' + model;

  security_message( port:0, data:report );
  exit( 0 );
}

exit( 99 );