Vulnerabilities > CVE-2017-8976 - Improper Input Validation vulnerability in HP Moonshot Provisioning Manager Appliance 1.20

047910
CVSS 9.8 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
network
low complexity
hp
CWE-20
critical
nessus

Summary

A Remote Code Execution vulnerability in Hewlett Packard Enterprise Moonshot Provisioning Manager Appliance version v1.20 was found.

Vulnerable Configurations

Part Description Count
Application
Hp
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

NASL familyCGI abuses
NASL idHPE_MOONSHOT_PROVISIONING_MANAGER_HPESBHF03803_RCE.NASL
descriptionThe HPE Moonshot Provisioning Manager running on the remote host is affected by two remote code execution vulnerabilities in the khuploadfile.cgi file due to the lack of proper validation of user-supplied data. An unauthenticated, remote attacker can exploit these issues, via a specially crafted HTTP POST message, to upload arbitrary files which could allow the attacker to execute arbitrary code. Note that the product is reportedly affected by an additional vulnerability in the server_response.py file; however, this plugin has not tested for it.
last seen2020-06-01
modified2020-06-02
plugin id106460
published2018-01-29
reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/106460
titleHPE Moonshot Provisioning Manager < 1.22 Multiple Vulnerabilities
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(106460);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id("CVE-2017-8975", "CVE-2017-8976");
  script_bugtraq_id(102410);
  script_xref(name:"ZDI", value:"ZDI-18-001");
  script_xref(name:"ZDI", value:"ZDI-18-002");
  script_xref(name:"HP", value:"HPESBHF03803");

  script_name(english:"HPE Moonshot Provisioning Manager < 1.22 Multiple Vulnerabilities");
  script_summary(english:"Detects if the fix has been applied.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is running a web application that is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The HPE Moonshot Provisioning Manager running on the remote host is
affected by two remote code execution vulnerabilities in the
khuploadfile.cgi file due to the lack of proper validation of
user-supplied data. An unauthenticated, remote attacker can exploit
these issues, via a specially crafted HTTP POST message, to upload
arbitrary files which could allow the attacker to execute arbitrary
code.

Note that the product is reportedly affected by an additional
vulnerability in the server_response.py file; however, this plugin
has not tested for it.");
  # https://support.hpe.com/hpsc/doc/public/display?docId=hpesbhf03803en_us
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?14d657df");
  script_set_attribute(attribute:"see_also", value:"https://www.zerodayinitiative.com/advisories/ZDI-18-001/");
  script_set_attribute(attribute:"see_also", value:"https://www.zerodayinitiative.com/advisories/ZDI-18-002/");
  script_set_attribute(attribute:"solution", value:
"Upgrade to HPE Moonshot Provisioning Manager v1.22 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:ND");
  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:X");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-8976");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/01/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/01/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/29");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"x-cpe:/a:hpe:moonshot_provisioning_manager");
  script_end_attributes();

  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("hpe_moonshot_provisioning_manager_detect.nbin");
  script_require_keys("installed_sw/HPE Moonshot Provisioning Manager");
  script_require_ports("Services/www", 443);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("webapp_func.inc");

app = "HPE Moonshot Provisioning Manager";

# Exit if MPM is not detected on the target
get_install_count(app_name:app, exit_if_zero:TRUE);

# Exit if MPM is not detected on this port 
port = get_http_port(default:443);
install = get_single_install(app_name:app, port:port);

#
# Request 1: Get the upload directory
#
url = '/cgi-bin/khuploadfile.cgi';

filename = crap(data:'A', length:300);
data = 'isofile.savepath=.&isofile.filename=' + filename;
res = http_send_recv3(
  method        : 'POST',
  item          : url,
  port          : port,
  data          : data,
  content_type  : 'application/x-www-form-urlencoded',
  exit_on_fail  : TRUE
);

matches = pregmatch(string:res[2], pattern: "Can't move uploaded file.*to (.+/)"+filename);

if(matches)
{
  upload_dir = matches[1];
}
else
{
  exit(1, 'Failed to get the upload directory for ' + app + '.');
}

#
# Request 2: Test whether the server strips any illegal characater in
#   the 'filename' field. Ilegal characters are: !$^&*()~[]|{};<>?`/\ 
#
filename = './';
data = 'isofile.savepath=' + upload_dir + '&isofile.filename=' + filename;
res = http_send_recv3(
  method        : 'POST',
  item          : url,
  port          : port,
  data          : data,
  content_type  : 'application/x-www-form-urlencoded',
  exit_on_fail  : TRUE
);

if(empty_or_null(res[2]))
{
  audit(AUDIT_RESP_BAD, port, 'an HTTP POST request: No data in the response body');  
}

vuln_pat = "Can't move uploaded file.*to " + upload_dir + filename;
patched_pat = "Can't move uploaded file.*to " + upload_dir + 
  str_replace(string:filename,find:'/', replace:'');

if(res[2] =~ vuln_pat)
{
  extra = 'Nessus was able to detect the issues with the following request :\n\n' + http_last_sent_request();

  security_report_v4(
    port       : port,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
}
else if(res[2] =~ patched_pat)
{
  audit(AUDIT_WEB_APP_NOT_AFFECTED, app, build_url(qs:install['path'], port:port));
}
else
{
  audit(AUDIT_RESP_BAD, port, "an HTTP POST request." + ' Unexpected HTTP response body:\n' + res[2]);
}