Juniper Networks Junos OS OpenSSH Information Leak and Buffer Overflow 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("1.3.6.1.4.1.25623.1.0.106065");
  script_version("2023-07-21T05:05:22+0000");
  script_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
  script_tag(name:"creation_date", value:"2016-05-04 23:14:04 +0200 (Wed, 04 May 2016)");
  script_tag(name:"cvss_base", value:"4.6");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:S/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-12-27 16:08:00 +0000 (Fri, 27 Dec 2019)");

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

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

  script_cve_id("CVE-2016-0777", "CVE-2016-0778");

  script_name("Juniper Networks Junos OS OpenSSH Information Leak and Buffer Overflow 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 an information leak and
buffer overflow vulnerability in the OpenSSH client.");

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

  script_tag(name:"insight", value:"CVE-2016-0777 and CVE-2016-0778 were released by
Qualys and cross-announced by OpenSSH on 2016-01-14.
The attack vector leading to potential compromise in these scenarios relates to a session
initiated from a Junos OS device using the SSH client to an external SSH server.");

  script_tag(name:"impact", value:"A malicious SSH server can obtain sensitive information
(e.g. private key) or cause a denial of service condition.");

  script_tag(name:"affected", value:"Junos OS 12.1, 12.3, 13.3, 14.1, 14.2 and 15.1");

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

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10734");

  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: "12.1X46-D45") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "12.1X46-D45");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.1X47-D35") < 0) &&
           (revcomp(a: version, b: "12.1X47") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "12.1X47-D35");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "12.3X48-D30") < 0) &&
           (revcomp(a: version, b: "12.3") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "12.3X48-D30");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^13") {
  if (revcomp(a: version, b: "13.3R9") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "13.3R9");
    security_message(port: 0, data: report);
    exit(0);
  }
}

if (version =~ "^14") {
  if (revcomp(a: version, b: "14.1R7") < 0) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.1R7");
    security_message(port: 0, data: report);
    exit(0);
  }
  else if ((revcomp(a: version, b: "14.2R6") < 0) &&
           (revcomp(a: version, b: "14.2") >= 0)) {
    report = report_fixed_ver(installed_version: version, fixed_version: "14.2R6");
    security_message(port: 0, data: report);
    exit(0);
  }
}

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

exit(99);