Vulnerabilities > CVE-2017-10793 - Information Exposure vulnerability in ATT U-Verse Firmware 9.2.2H0D83

047910
CVSS 4.3 - MEDIUM
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
NONE
Availability impact
NONE
network
att
CWE-200
nessus
NVD
Published: 2017-09-03
Updated: 2021-08-23

Summary

The AT&T U-verse 9.2.2h0d83 firmware for the Arris NVG589, NVG599, and unspecified other devices, when IP Passthrough mode is not used, configures an sbdc.ha WAN TCP service on port 61001 with the bdctest account and the bdctest password, which allows remote attackers to obtain sensitive information (such as the Wi-Fi password) by leveraging knowledge of a hardware identifier, related to the Bulk Data Collection (BDC) mechanism defined in Broadband Forum technical reports.

Vulnerable Configurations

Part Description Count
OS
Att
1
Hardware
Commscope
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

NASL familyCGI abuses
NASL idARRIS_MODEM_SHARKNATTO.NASL
descriptionThe remote Arris device
last seen2020-06-01
modified2020-06-02
plugin id102916
published2017-09-01
reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/102916
titleAT&T U-verse Arris Modems NVG589 / NVG599 / 5268AC Multiple Vulnerabilities (SharknATTo)
code
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(102916);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id(
    "CVE-2017-10793",
    "CVE-2017-14115",
    "CVE-2017-14116",
    "CVE-2017-14117"
  );
  script_bugtraq_id(100585);

  script_name(english:"AT&T U-verse Arris Modems NVG589 / NVG599 / 5268AC Multiple Vulnerabilities (SharknATTo)");
  script_summary(english:"Looks for the product and version in the about page.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is affected by multiple vulnerabilities, including multiple
remote code execution vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote Arris device's self report model is NVG589, NVG599 or 5268AC.
It is, therefor, affected by multiple vulnerabilities, including a firewall
bypass, multiple instances of hardcoded credentials, privilege escalation, and
remote code execution.

Note: Nessus has not checked the firmware version and is detecting this vulnerability
based on the device's self reported model number.");
  script_set_attribute(attribute:"see_also", value:"https://www.nomotion.net/blog/sharknatto/");
  script_set_attribute(attribute:"solution", value:
"No vendor-supplied fix is currently available. Contact vendor for further details.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:U/RC:ND");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:U/RC:X");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-14116");

  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:"2017/08/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/01");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("http_version.nasl");
  script_require_keys("Settings/ParanoidReport");
  script_require_ports("Services/www", 80, 443);

  exit(0);
}

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

if (report_paranoia < 2) audit(AUDIT_PARANOID);

port     = get_http_port(default:80);
item = "/xslt?PAGE=C_0_0";
vuln = FALSE;

res = http_send_recv3(method:"GET", item:item, port:port);
if (!isnull(res[2])  && '<a href="/xslt?PAGE=C_2_0">LAN</a>' >< res[2] && '<a href="/xslt?PAGE=C_3_0">Firewall</a>' >< res[2])
{
  pat = "<td>(NVG59[89]|5268AC)</td>";
  match = pregmatch(string:res[2], pattern:pat);
  if (!isnull(match))
  {
    model  = match[1];
    vuln = TRUE;
  }
}

if(vuln)
{
  report = '\nBased on its self-reported model number the remote device is vulnerable.\n';
  report += '\n    Model : ' + model;
  report += '\n    Fix   : Contact vendor for further details.\n';
  security_report_v4(severity:SECURITY_HOLE, port:port, extra:report);
}
else audit(AUDIT_HOST_NOT, "an affected model");

References