Juniper Networks Junos OS Firewall Bypass Vulnerability

# SPDX-FileCopyrightText: 2015 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:juniper:junos";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105940");
  script_cve_id("CVE-2014-6383");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_version("2026-04-24T06:23:04+0000");

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

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Juniper Networks Junos OS Firewall Bypass Vulnerability");

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10666");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/72071");

  script_tag(name:"summary", value:"Junos with the Trio-based PFE modules are affected from a
security bybass vulnerability.");

  script_tag(name:"impact", value:"An attacker can bybass certain security restrictions and
perform unauthorized actions which may lead to further attacks.");

  script_tag(name:"insight", value:"When configuring a stateless firewall filter on a system
with Trio-based PFE modules (e.g. MX Series), any source or destination port matching condition
may fail to match intended packets, causing the filter to not execute the actions specified in
the 'then' clause. Depending on the intent and design of the interface filter, this match failure
may have unexpected impact on the router or follow-on filter clauses. For example, if traffic with
a specific destination port was designed to be accepted, a later 'reject all' clause may inadvertently
discard wanted traffic. Conversely, if certain destination ports are meant to be dropped, malicious
traffic may be consumed by the RE or forwarded on to downstream routers.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable OS build is present on the target host.");
  script_tag(name:"solution", value:"Update to Junos OS 13.3R3-S3, 13.3R4, 14.1R3, 14.2R1, or
any subsequent releases.");
  script_tag(name:"affected", value:"Junos OS 13.3 and 14.1");

  script_tag(name:"last_modification", value:"2026-04-24 06:23:04 +0000 (Fri, 24 Apr 2026)");
  script_tag(name:"creation_date", value:"2015-01-23 10:28:17 +0700 (Fri, 23 Jan 2015)");
  script_category(ACT_GATHER_INFO);
  script_family("JunOS Local Security Checks");
  script_copyright("Copyright (C) 2015 Greenbone AG");
  script_dependencies("gb_juniper_junos_consolidation.nasl");
  script_mandatory_keys("juniper/junos/detected");

  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");

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

if (version =~ "^13\.3") {
  if (revcomp(a:version, b:"13.3R3-S3") < 0) {
    security_message(port:0, data:version);
    exit(0);
  }
}

if (version =~ "^14") {
  if (revcomp(a:version, b:"14.1R3") < 0) {
    security_message(port:0, data:version);
    exit(0);
  }
}

exit(99);