Juniper Networks Junos OS CSRF Protection Bypass Vulnerability in J-Web

# 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("1.3.6.1.4.1.25623.1.0.103951");
  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:"2013-11-15 14:20:14 +0700 (Fri, 15 Nov 2013)");
  script_tag(name:"cvss_base", value:"5.1");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:N/C:P/I:P/A:P");

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

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

  script_cve_id("CVE-2013-4689");

  script_name("Juniper Networks Junos OS CSRF Protection Bypass Vulnerability in J-Web");

  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:"A CSRF Protection bypass in J-Web allows an attacker to gain
unauthorized access to the affected device.");

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

  script_tag(name:"insight", value:"A vulnerability in J-Web may allow remote attackers to bypass
CSRF (Cross-Site Request Forgery) Protection in J-Web.");

  script_tag(name:"impact", value:"An attacker can perform adimistrative actions such as creating
new administrative accounts to gain complete control over the device.");

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

  script_tag(name:"solution", value:"New builds of Junos OS software are available from Juniper. As
a workaround disable J-Web or limit access to only trusted hosts.");

  script_xref(name:"URL", value:"http://kb.juniper.net/JSA10597");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/62940");

  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:"20130831") >= 0) {
  exit(99);
}

if (revcomp(a:version, b:"10.4R13") < 0) {
  security_message(port:0, data:desc);
  exit(0);
}

if (version =~ "^11") {
  if (revcomp(a:version, b:"11.4R7") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  }
}

if (version =~ "^12") {
  if (revcomp(a:version, b:"12.1R6") < 0) {
    security_message(port:0, data:desc);
    exit(0);
  } else if ((revcomp(a:version, b:"12.1X44-D15") < 0) &&
             (revcomp(a:version, b:"12.1X44") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  } else if ((revcomp(a:version, b:"12.1X45-D10") < 0) &&
             (revcomp(a:version, b:"12.1X45") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  } else if ((revcomp(a:version, b:"12.2R3") < 0) &&
             (revcomp(a:version, b:"12.2") >= 0)) {
      security_message(port:0, data:desc);
      exit(0);
  } else if ((revcomp(a:version, b:"12.3R2") < 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);
  }
}

exit(99);