Juniper Networks Junos OS Security Issue with Proxy ARP Enabled

# SPDX-FileCopyrightText: 2013 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("1.3.6.1.4.1.25623.1.0.103952");
  script_version("2026-04-24T06:23:04+0000");
  script_tag(name:"last_modification", value:"2026-04-24 06:23:04 +0000 (Fri, 24 Apr 2026)");
  script_tag(name:"creation_date", value:"2013-11-18 12:34:58 +0700 (Mon, 18 Nov 2013)");
  script_tag(name:"cvss_base", value:"6.1");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:L/Au:N/C:N/I:C/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-09-27 17:24:00 +0000 (Fri, 27 Sep 2019)");

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

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

  script_cve_id("CVE-2013-6014");

  script_name("Juniper Networks Junos OS Security Issue with Proxy ARP Enabled");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_family("JunOS Local Security Checks");
  script_dependencies("gb_juniper_junos_consolidation.nasl");
  script_mandatory_keys("juniper/junos/detected", "juniper/junos/build");

  script_tag(name:"summary", value:"New builds of Junos OS software are available from Juniper.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable OS build is present on the target host.");

  script_tag(name:"insight", value:"When Proxy ARP is enabled on an unnumbered interface, it allows
remote attackers to perform ARP poisoning attacks and possibly obtain sensitive information via a crafted
ARP message.");

  script_tag(name:"impact", value:"An attacker can either create a denial of service attack or
might obtain some sensitive information.");

  script_tag(name:"affected", value:"Platforms running Junos OS 10.4, 11.4, 11.4X27, 12.1, 12.1X44,
12.1X45, 12.2, 12.3, or 13.1");

  script_tag(name:"solution", value:"New builds of Junos OS software are available from Juniper.");

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10595");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/63391");

  exit(0);
}

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

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

build = get_kb_item("juniper/junos/build");
if (!build)
  exit(0);

desc += "Version/Build-Date:
" + version + " / " + build;

build2check = str_replace(string:build, find:"-", replace:"");

if (revcomp(a:build2check, b:"20130918") >= 0) {
  exit(99);
}

if (revcomp(a:version, b:"10.4S15") < 0) {
  security_message(port:0, data:desc);
  exit(0);
}

if (version =~ "^11") {
  if (revcomp(a:version, b:"11.4R9") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"11.4X27.44") < 0) &&
             (revcomp(a:version, b:"11.4X27") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  }
}

if (version =~ "^12") {
  if (revcomp(a:version, b:"12.1R7") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"12.1X44-D20") < 0) &&
             (revcomp(a:version, b:"12.1X44") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  } else if ((revcomp(a:version, b:"12.1X45-D15") < 0) &&
             (revcomp(a:version, b:"12.1X45") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  } else if ((revcomp(a:version, b:"12.2R6") < 0) &&
             (revcomp(a:version, b:"12.2") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  } else if ((revcomp(a:version, b:"12.3R3") < 0) &&
             (revcomp(a:version, b:"12.3") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  }
}

if (version =~ "^13") {
  if (revcomp(a:version, b:"13.1R3") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"13.2R1") < 0) &&
             (revcomp(a:version, b:"13.2") >= 0)) {
    security_message(port:0, data:desc);
    exit(0);
  }
}

exit(99);