Juniper Networks Junos OS LDP DoS Vulnerability

# 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:juniper:junos";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106061");
  script_version("2023-07-20T05:05:17+0000");
  script_tag(name:"last_modification", value:"2023-07-20 05:05:17 +0000 (Thu, 20 Jul 2023)");
  script_tag(name:"creation_date", value:"2016-01-18 09:17:30 +0700 (Mon, 18 Jan 2016)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2016-12-03 03:20:00 +0000 (Sat, 03 Dec 2016)");

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

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

  script_cve_id("CVE-2016-1257");

  script_name("Juniper Networks Junos OS LDP DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_family("JunOS Local Security Checks");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_dependencies("gb_juniper_junos_consolidation.nasl");
  script_mandatory_keys("juniper/junos/detected");

  script_tag(name:"summary", value:"Junos OS is prone to a Denial of Service vulnerability with
LDP enabled.");

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

  script_tag(name:"insight", value:"If LDP is enabled via the 'protocols ldp' configuration option
on a device running Junos OS, receipt of a crafted LDP packet may cause the RPD routing process to crash
and restart.  The interface on which the packet arrives does not need to have LDP enabled.  As long as
one interface to the peer has LDP enabled, the packet will be sent to Routing Engine for further
processing, exposing the router to a denial of service (RPD crash).");

  script_tag(name:"impact", value:"An attacker can cause a denial of service condition by crashing
the RPD routing process.");

  script_tag(name:"affected", value:"Junos OS 13.2, 13.3, 14.1, 14.2 and 15.1");

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

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10715");

  exit(0);
}

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

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

if (version =~ "^13") {
  if ((revcomp(a: version, b: "13.3R7-S3") < 0) &&
      (revcomp(a: version, b: "13.2R5") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
}

if (version =~ "^14") {
  if (revcomp(a: version, b: "14.1R3-S9") < 0) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.1X51-D65") < 0) &&
           (revcomp(a: version, b: "14.1X51") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.1X53-D12") < 0) &&
           (revcomp(a: version, b: "14.1X53") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.2R3-S4") < 0) &&
           (revcomp(a: version, b: "14.2") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
}

if (version =~ "^15") {
  if (revcomp(a: version, b: "15.1R3") < 0) {
    security_message(port: 0, data: version);
    exit(0);
  }
  else if ((revcomp(a: version, b: "15.1X49-D40") < 0) &&
           (revcomp(a: version, b: "15.1X49") >= 0)) {
    security_message(port: 0, data: version);
    exit(0);
  }
}

exit(99);