Juniper Networks Junos OS Buffer Overflow Vulnerability

# SPDX-FileCopyrightText: 2017 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("1.3.6.1.4.1.25623.1.0.106750");
  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:"2017-04-13 08:24:49 +0200 (Thu, 13 Apr 2017)");
  script_tag(name:"cvss_base", value:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-04-20 01:59:00 +0000 (Thu, 20 Apr 2017)");

  script_cve_id("CVE-2016-1886");

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

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

  script_name("Juniper Networks Junos OS Buffer Overflow Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_family("JunOS Local Security Checks");
  script_copyright("Copyright (C) 2017 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 buffer overflow vulnerability in the keyboard
driver.");

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

  script_tag(name:"insight", value:"Incorrect signedness comparison in the ioctl handler allows a malicious
local user to overwrite a portion of the kernel memory. A local user may crash the kernel, read a portion of
kernel memory and execute arbitrary code in kernel context.");

  script_tag(name:"impact", value:"A local attacker may escalate privileges by executing arbitrary code.");

  script_tag(name:"affected", value:"Junos OS 12.3X48, 14.1, 14.2, 15.1 and 16.1.");

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

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10784");

  exit(0);
}

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

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

if (version =~ "^12") {
  if ((revcomp(a: version, b: "12.3X48-D55") < 0) &&
      (revcomp(a: version, b: "12.3X48") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "12.3X48-D55");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^14") {
  if (revcomp(a: version, b: "14.1R9") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.1R9");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.1X53-D50") < 0) &&
           (revcomp(a: version, b: "14.1X53") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.1X53-D50");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.2R7") < 0) &&
           (revcomp(a: version, b: "14.2") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.2R7");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^15") {
  if ((revcomp(a: version, b: "15.1F5-S5") < 0) &&
      (revcomp(a: version, b: "15.1F") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1F5-S5");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "15.1R5") < 0) &&
           (revcomp(a: version, b: "15.1R") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1R5");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "15.1X49-D60") < 0) &&
           (revcomp(a: version, b: "15.1X49") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1X49-D60");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "15.1X53-D230") < 0) &&
           (revcomp(a: version, b: "15.1X53") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "15.1X53-D230");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^16") {
  if (revcomp(a: version, b: "16.1R2") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "16.1R2");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);