Vulnerabilities > CVE-2015-0653 - Improper Authentication vulnerability in Cisco products

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
cisco
CWE-287
critical
nessus
NVD
Published: 2015-03-13
Updated: 2019-06-11

Summary

The management interface in Cisco TelePresence Video Communication Server (VCS) and Cisco Expressway before X7.2.4, X8 before X8.1.2, and X8.2 before X8.2.2 and Cisco TelePresence Conductor before X2.3.1 and XC2.4 before XC2.4.1 allows remote attackers to bypass authentication via crafted login parameters, aka Bug IDs CSCur02680 and CSCur05556.

Vulnerable Configurations

Part Description Count
Application
Cisco
15

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Authentication Abuse
    An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
  • 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.
  • Utilizing REST's Trust in the System Resource to Register Man in the Middle
    This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
  • Man in the Middle Attack
    This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.

Nessus

  • NASL familyCISCO
    NASL idCISCO_TELEPRESENCE_CONDUCTOR_SA_CSCUR05556.NASL
    descriptionAccording to its self-reported version number, the Cisco TelePresence Conductor on the remote host contains an vulnerability due to inadequate validation of parameters passed during the login process. A remote attacker, using a crafted request and knowledge of a valid user name, can bypass authentication requirements and login to the system.
    last seen2020-06-01
    modified2020-06-02
    plugin id81973
    published2015-03-20
    reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/81973
    titleCisco TelePresence Conductor Login Security Bypass Vulnerability
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(81973);
  script_version("1.8");
  script_cvs_date("Date: 2018/11/15 20:50:20");

  script_cve_id("CVE-2015-0653");
  script_bugtraq_id(73044);
  script_xref(name:"CISCO-BUG-ID", value:"CSCur05556");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20150311-vcs");

  script_name(english:"Cisco TelePresence Conductor Login Security Bypass Vulnerability");
  script_summary(english:"Checks the software version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a security bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the Cisco TelePresence
Conductor on the remote host contains an vulnerability due to
inadequate validation of parameters passed during the login process.
A remote attacker, using a crafted request and knowledge of a valid
user name, can bypass authentication requirements and login to the
system.");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/bugsearch/bug/CSCur05556");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150311-vcs
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3ed34af5");
  script_set_attribute(attribute:"solution", value:"Upgrade to version 2.3.1 / 2.4.1 / 3.0 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:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/03/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/03/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/20");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:telepresence_conductor");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");

  script_dependencies("cisco_telepresence_conductor_detect.nbin");
  script_require_keys("Host/Cisco_TelePresence_Conductor/Version");

  exit(0);
}

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

prod = "Cisco TelePresence Conductor";
version = get_kb_item_or_exit("Host/Cisco_TelePresence_Conductor/Version");

# Note that XC3.0PreAlpha2 is listed
# as vuln, but it is not clear what
# such a version would appear like.
if (
  version =~ "^1(\.|$)"        ||
  version =~ "^2\.[0-2](\.|$)" ||
  version =~ "^2\.3(\.0($|[^0-9])|$)"
)
  fix = '2.3.1';
else if (
  version =~ "^2\.4(\.0($|[^0-9])|$)"
)
  fix = '2.4.1 / 3.0';
else
  audit(AUDIT_INST_VER_NOT_VULN, prod, version);

if (report_verbosity > 0)
{
  report = '\n  Installed version : ' + version +
           '\n  Fixed versions    : ' + fix +
           '\n';
  security_hole(port:0, extra:report);
}
else security_hole(0);
  • NASL familyCISCO
    NASL idCISCO_TELEPRESENCE_VCS_SA_CSCUR02680.NASL
    descriptionAccording to its self-reported version number, the Cisco TelePresence VCS or Expressway Series on the remote host contains an vulnerability due to inadequate validation of parameters passed during the login process. A remote attacker, using a crafted request and knowledge of a valid user name, can bypass authentication requirements and login to the system.
    last seen2020-06-01
    modified2020-06-02
    plugin id81974
    published2015-03-20
    reporterThis script is Copyright (C) 2015-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/81974
    titleCisco TelePresence VCS / Expressway Series < 7.2.4 / 8.1.2 / 8.2.2 Login Security Bypass Vulnerability
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(81974);
  script_version("1.8");
  script_cvs_date("Date: 2018/11/15 20:50:20");

  script_cve_id("CVE-2015-0653");
  script_bugtraq_id(73044);
  script_xref(name:"CISCO-BUG-ID", value:"CSCur02680");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20150311-vcs");

  script_name(english:"Cisco TelePresence VCS / Expressway Series < 7.2.4 / 8.1.2 / 8.2.2 Login Security Bypass Vulnerability");
  script_summary(english:"Checks the software version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a security bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the Cisco TelePresence
VCS or Expressway Series on the remote host contains an vulnerability
due to inadequate validation of parameters passed during the login
process. A remote attacker, using a crafted request and knowledge of a
valid user name, can bypass authentication requirements and login to
the system.");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/bugsearch/bug/CSCur02680");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150311-vcs
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3ed34af5");
  script_set_attribute(attribute:"solution", value:"Upgrade to version 7.2.4 / 8.1.2 / 8.2.2 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:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/03/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/03/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/03/20");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:telepresence_video_communication_server_software");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:expressway_software");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");

  script_dependencies("cisco_telepresence_video_communication_server_detect.nbin");
  script_require_keys("Cisco/TelePresence_VCS/Version");

  exit(0);
}

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

version  = get_kb_item_or_exit("Cisco/TelePresence_VCS/Version");
fullname = "Cisco TelePresence Device";

# CVRF and Alert listed >= 5.2 and < 8.1.2 and
# 8.2.x < 8.2.1 as affected by CVE-2015-0653
if (
  ver_compare(ver:version, fix:"5.2", strict:FALSE) >= 0 &&
  ver_compare(ver:version, fix:"7.2.4", strict:FALSE) <  0
)
  fix = '7.2.4';
else if
(
  version =~ "^8\.1($|[^0-9])" &&
  ver_compare(ver:version, fix:"8.1.2", strict:FALSE) <  0
)
  fix = '8.1.2';
else if
(
  version =~ "^8\.2($|[^0-9])" &&
  ver_compare(ver:version, fix:"8.2.2", strict:FALSE) <  0
)
  fix = '8.2.2';
else
  audit(AUDIT_DEVICE_NOT_VULN, fullname, version);

if (report_verbosity > 0)
{
  report = '\n  Installed version : ' + version +
           '\n  Fixed version     : ' + fix +
           '\n';
  security_hole(port:0, extra:report);
}
else security_hole(0);

References