Vulnerabilities > CVE-2014-3398 - Information Exposure vulnerability in Cisco Adaptive Security Appliance Software

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN
cisco
CWE-200
nessus
NVD
Published: 2014-10-05
Updated: 2023-08-11

Summary

The SSL VPN implementation in Cisco Adaptive Security Appliance (ASA) Software allows remote attackers to obtain potentially sensitive software-version information by reading the verbose response data that is provided for a request to an unspecified URL, aka Bug ID CSCuq65542.

Vulnerable Configurations

Part Description Count
OS
Cisco
1

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 familyCISCO
    NASL idCISCO_ASA_VER_INFO_DISCLOSURE.NASL
    descriptionAccording to its version and configuration, the Cisco Adaptive Security Appliance (ASA) software on the remote device is affected by an information disclosure vulnerability in the SSL VPN feature due to improperly returning verbose response data. An unauthenticated, remote attacker can exploit this, by requesting a specific URL (/CSCOSSLC/config-auth) via HTTPS, to disclose the software version information.
    last seen2020-06-01
    modified2020-06-02
    plugin id91964
    published2016-07-06
    reporterThis script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/91964
    titleCisco ASA SSL VPN Functionality Version Information Disclosure (CSCuq65542)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(91964);
  script_version("1.8");
  script_cvs_date("Date: 2019/12/04");

  script_cve_id("CVE-2014-3398");
  script_bugtraq_id(70230);
  script_xref(name:"CISCO-BUG-ID", value:"CSCuq65542");

  script_name(english:"Cisco ASA SSL VPN Functionality Version Information Disclosure (CSCuq65542)");
  script_summary(english:"Attempts to get the device version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its version and configuration, the Cisco Adaptive
Security Appliance (ASA) software on the remote device is affected by
an information disclosure vulnerability in the SSL VPN feature due to
improperly returning verbose response data. An unauthenticated, remote
attacker can exploit this, by requesting a specific URL
(/CSCOSSLC/config-auth) via HTTPS, to disclose the software version
information.");
  # https://tools.cisco.com/security/center/viewAlert.x?alertId=35946
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?90ac6b01");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/security/center/viewAlert.x?alertId=35946");
  # http://carnal0wnage.attackresearch.com/2015/02/cisco-asa-version-grabber-cve-2014-3398.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d5013fbe");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant patch referenced in Cisco bug ID CSCuq65542.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:"2014/10/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/10/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/07/06");

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

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

  script_copyright(english:"This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_asa_ssl_vpn_detect.nasl");
  script_require_keys("Services/cisco-ssl-vpn-svr");
  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");

appname = "Cisco ASA";
port    = get_service(svc:"cisco-ssl-vpn-svr", default:443, exit_on_fail:TRUE);

url     = "/CSCOSSLC/config-auth";
version = UNKNOWN_VER;

res = http_send_recv3(method:"GET", item:url, port:port, exit_on_fail:TRUE);

if (res[0] =~ "^HTTP/[0-9.]+ +200" && "<config-auth client=" >< res[2])
{
  # Example: <version who="sg">9.1(5)</version>
  pat = "<version [^>]+>([0-9.]+\([0-9.]+\)\d{0,2})</version>";

  matches = eregmatch(pattern:pat, string:res[2]);
  if (!isnull(matches))
  {
    version = matches[1]; 

    report = 
      '\n' + "Nessus was able to determine the remote Cisco ASA version :" +
      '\n' +
      '\n' + "  URL     : " + build_url(port:port, qs:url) + 
      '\n' + "  Version : " + version +
      '\n';
    security_report_v4(severity:SECURITY_WARNING, port:port, extra:report);
  }
  else audit(AUDIT_DEVICE_NOT_VULN, "The "+appname+" on port "+port);
}
else audit(AUDIT_DEVICE_NOT_VULN, "The "+appname+" on port "+port);
  • NASL familyCISCO
    NASL idCISCO-SN-CSCUQ65542-ASA.NASL
    descriptionAccording to its banner, the version of the Cisco ASA software on the remote device is affected by an information disclosure vulnerability in the SSL VPN feature. By requesting a specific URL, a remote attacker can exploit this vulnerability to obtain software version information which could be used for reconnaissance attacks. Note that the SSL VPN feature must be enabled for the device to be affected by this vulnerability.
    last seen2019-10-28
    modified2014-11-20
    plugin id79359
    published2014-11-20
    reporterThis script is Copyright (C) 2014-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/79359
    titleCisco ASA SSL VPN Information Disclosure (CSCuq65542)
    code
    #TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(79359);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2018/11/15");

  script_cve_id("CVE-2014-3398");
  script_bugtraq_id(70230);
  script_xref(name:"CISCO-BUG-ID", value:"CSCuq65542");

  script_name(english:"Cisco ASA SSL VPN Information Disclosure (CSCuq65542)");
  script_summary(english:"Checks the ASA version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"According to its banner, the version of the Cisco ASA software on the
remote device is affected by an information disclosure vulnerability
in the SSL VPN feature. By requesting a specific URL, a remote
attacker can exploit this vulnerability to obtain software version
information which could be used for reconnaissance attacks.

Note that the SSL VPN feature must be enabled for the device to be
affected by this vulnerability.");
  # https://tools.cisco.com/security/center/viewAlert.x?alertId=35946
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?90ac6b01");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/security/center/viewAlert.x?alertId=35946");
  script_set_attribute(attribute:"solution", value:"Apply the relevant patch referenced in Cisco bug ID CSCuq65542.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:adaptive_security_appliance_software");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/10/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/10/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/11/20");

  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2018 Tenable Network Security, Inc.");
  script_family(english:"CISCO");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/Cisco/ASA");

  exit(0);
}

include("audit.inc");
include("cisco_func.inc");
include("cisco_kb_cmd_func.inc");

asa   = get_kb_item_or_exit('Host/Cisco/ASA');

ver = extract_asa_version(asa);
if (isnull(ver)) audit(AUDIT_FN_FAIL, 'extract_asa_version');

fixed_ver = NULL;

if (ver =~ "^8\.4[^0-9]" && check_asa_release(version:ver, patched:"8.4(7.23)"))
  fixed_ver = "8.4(7.23)";

else if (ver =~ "^8\.6[^0-9]")
  fixed_ver = "Refer to the vendor.";

else if (ver =~ "^9\.0[^0-9]" && check_asa_release(version:ver, patched:"9.0(4.25)"))
  fixed_ver = "9.0(4.25)";

else if (ver =~ "^9\.1[^0-9]" && check_asa_release(version:ver, patched:"9.1(5.15)"))
  fixed_ver = "9.1(5.15)";

else if (ver =~ "^9\.2[^0-9]" && check_asa_release(version:ver, patched:"9.2(2.7)"))
  fixed_ver = "9.2(2.7)";

if (isnull(fixed_ver))
  audit(AUDIT_INST_VER_NOT_VULN, "Cisco ASA software", ver);

flag     = FALSE;
override = FALSE;

# Check if SSL VPN (WebVPN) feature is enabled
if (get_kb_item("Host/local_checks_enabled"))
{
  buf = cisco_command_kb_item("Host/Cisco/Config/show_running-config_webvpn", "show running-config webvpn");
  if (check_cisco_result(buf))
  {
    if (preg(multiline:TRUE, pattern:"enable", string:buf)) flag = TRUE;
  }
  else if (cisco_needs_enable(buf)) override = TRUE;
}

if (!flag && !override) audit(AUDIT_HOST_NOT, "affected");

if (report_verbosity > 0)
{
  report =
    '\n  Installed version : ' + ver +
    '\n  Fixed version     : ' + fixed_ver +
    '\n';
  security_warning(port:0, extra:report+cisco_caveat(override));
}
else security_warning(port:0, extra:cisco_caveat(override));

References