Vulnerabilities > CVE-2014-2129 - Improper Input Validation 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-20
nessus
NVD
Published: 2014-04-10
Updated: 2023-08-15

Summary

The SIP inspection engine in Cisco Adaptive Security Appliance (ASA) Software 8.2 before 8.2(5.48), 8.4 before 8.4(6.5), 9.0 before 9.0(3.1), and 9.1 before 9.1(2.5) allows remote attackers to cause a denial of service (memory consumption or device reload) via crafted SIP packets, aka Bug ID CSCuh44052.

Vulnerable Configurations

Part Description Count
OS
Cisco
4

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 familyCISCO
NASL idCISCO-SA-20140409-ASA.NASL
descriptionThe remote Cisco ASA device is affected by one or more of the following vulnerabilities : - An issue exists in the Adaptive Security Device Manager (ADSM) due to improper privilege assignment to users with a privilege level of zero. This issue allows an authenticated, remote attacker to gain administrative privileges. (CVE-2014-2126) - An issue exists in the SSL VPN portal when the Clientless SSL VPN feature is used due to improper handling of management session information. An authenticated, remote attacker can exploit this to gain administrative privileges. (CVE-2014-2127) - An issue exists in the SSL VPN feature due to improper handling of authentication cookies. An unauthenticated, remote attacker can exploit this to bypass authentication, resulting in unauthorized access to internal network resources. (CVE-2014-2128) - An issue exists in the SIP inspection engine due to improper handling of SIP packets. An unauthenticated, remote attacker can exploit this to cause memory exhaustion, resulting in a denial of service. (CVE-2014-2129) Note that that the verification check for the presence of CVE-2014-2128 is a best effort approach and may result in potential false positives.
last seen2019-10-28
modified2014-04-15
plugin id73533
published2014-04-15
reporterThis script is Copyright (C) 2014-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/73533
titleCisco ASA Software Multiple Vulnerabilities (cisco-sa-20140409-asa)
code
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(73533);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2018/11/15");

  script_cve_id(
    "CVE-2014-2126",
    "CVE-2014-2127",
    "CVE-2014-2128",
    "CVE-2014-2129"
  );
  script_bugtraq_id(66745, 66746, 66747, 66748);
  script_xref(name:"CISCO-BUG-ID", value:"CSCua85555");
  script_xref(name:"CISCO-BUG-ID", value:"CSCuh44052");
  script_xref(name:"CISCO-BUG-ID", value:"CSCuj33496");
  script_xref(name:"CISCO-BUG-ID", value:"CSCul70099");
  script_xref(name:"CISCO-SA", value:"cisco-sa-20140409-asa");

  script_name(english:"Cisco ASA Software Multiple Vulnerabilities (cisco-sa-20140409-asa)");
  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:
"The remote Cisco ASA device is affected by one or more of the
following vulnerabilities :

  - An issue exists in the Adaptive Security Device Manager
    (ADSM) due to improper privilege assignment to users
    with a privilege level of zero. This issue allows an
    authenticated, remote attacker to gain administrative
    privileges. (CVE-2014-2126)

  - An issue exists in the SSL VPN portal when the
    Clientless SSL VPN feature is used due to improper
    handling of management session information. An
    authenticated, remote attacker can exploit this to gain
    administrative privileges. (CVE-2014-2127)

  - An issue exists in the SSL VPN feature due to improper
    handling of authentication cookies. An unauthenticated,
    remote attacker can exploit this to bypass
    authentication, resulting in unauthorized access to
    internal network resources. (CVE-2014-2128)

  - An issue exists in the SIP inspection engine due to
    improper handling of SIP packets. An unauthenticated,
    remote attacker can exploit this to cause memory
    exhaustion, resulting in a denial of service.
    (CVE-2014-2129)

Note that that the verification check for the presence of
CVE-2014-2128 is a best effort approach and may result in potential
false positives.");
  # https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140409-asa
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?687b1a20");
  script_set_attribute(attribute:"solution", value:
"Apply the relevant patch or workaround referenced in Cisco Security
Advisory cisco-sa-20140409-asa.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/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:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:cisco:adaptive_security_appliance_software");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:asa_5500");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:asa_6500");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:asa_7600");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:cisco:asa_1000V");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/04/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/07/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/04/15");

  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", "Host/Cisco/ASA/model");
  exit(0);
}

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

asa = get_kb_item_or_exit('Host/Cisco/ASA');
model = get_kb_item_or_exit('Host/Cisco/ASA/model');
ver = extract_asa_version(asa);
if (isnull(ver)) audit(AUDIT_FN_FAIL, 'extract_asa_version');

# Verify that we are targeting an affected hardware model
#   Cisco ASA 5500 Series Adaptive Security Appliances
#   Cisco ASA 5500-X Next Generation Firewall
#   Cisco ASA Services Module for Cisco Catalyst 6500 Series Switches
#   Cisco 7600 Series Routers
#   Cisco ASA 1000V Cloud Firewall
if (
  model !~ '^55[0-9][0-9]($|[^0-9])' &&
  model !~ '^65[0-9][0-9]($|[^0-9])' &&
  model !~ '^76[0-9][0-9]($|[^0-9])' &&
  model !~ '^1000V'
) audit(AUDIT_HOST_NOT, "ASA 5500 5000-X 6500 7600 or 1000V");

flag = 0;
report_extras = "";
fixed_ver = "";
local_check = 0;
override = 0;

# For each vulnerability, check for affected OS versions,
# set "fixed" os version, and perform any additional checks

# Determine if additional local checks can be performed
if (
  get_kb_item("Host/local_checks_enabled")
) local_check = 1;

# #################################################
# CSCuj33496
# #################################################
cbi = "CSCuj33496";
temp_flag = 0;

if (ver =~ "^8\.2[^0-9]" && check_asa_release(version:ver, patched:"8.2(5.47)"))
{
  temp_flag++;
  fixed_ver = "8.2(5)47";
}

else if (ver =~ "^8\.4[^0-9]" && check_asa_release(version:ver, patched:"8.4(7.5)"))
{
  temp_flag++;
  fixed_ver = "8.4(7)5";
}

else if (ver =~ "^8\.7[^0-9]" && check_asa_release(version:ver, patched:"8.7(1.11)"))
{
  temp_flag++;
  fixed_ver = "8.7(1)11";
}

else if (ver =~ "^9\.0[^0-9]" && check_asa_release(version:ver, patched:"9.0(3.10)"))
{
  temp_flag++;
  fixed_ver = "9.0(3)10";
}

else if (ver =~ "^9\.1[^0-9]" && check_asa_release(version:ver, patched:"9.1(3.4)"))
{
  temp_flag++;
  fixed_ver = "9.1(3)4";
}

if (local_check)
{
  if (temp_flag)
  {
    temp_flag = 0;
    # Check if HTTP is enabled
    buf = cisco_command_kb_item(
      "Host/Cisco/Config/show_running-config_http",
      "show running-config http"
    );
    if (check_cisco_result(buf))
    {
      if (preg(multiline:TRUE, pattern:"http server enable", string:buf))
      {
        # Check if a user has been assigned privilege level 0
        buf = cisco_command_kb_item(
          "Host/Cisco/Config/show_running-config_username_include_privilege_0",
          "show running-config username | include privilege 0"
        );
        if (check_cisco_result(buf))
        {
          if (preg(multiline:TRUE, pattern:"privilege 0$", string:buf))
            temp_flag = 1;
        }
        else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
      }
    }
    else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
  }
}

if (temp_flag)
{
  report +=
    '\n  Cisco bug ID        : ' + cbi +
    '\n    Installed release : ' + ver +
    '\n    Fixed release     : ' + fixed_ver + '\n';
  flag++;
}
# #################################################
# CSCul70099
# #################################################
cbi = "CSCul70099";
temp_flag = 0;

if (ver =~ "^8\.[01][^0-9]")
{
  temp_flag++;
  fixed_ver = "This branch is no longer supported. Refer to the vendor for a fix.";
}

else if (ver =~ "^8\.2[^0-9]" && check_asa_release(version:ver, patched:"8.2(5.48)"))
{
  temp_flag++;
  fixed_ver = "8.2(5)48";
}

else if (ver =~ "^8\.3[^0-9]" && check_asa_release(version:ver, patched:"8.3(2.40)"))
{
  temp_flag++;
  fixed_ver = "8.3(2)40";
}

else if (ver =~ "^8\.4[^0-9]" && check_asa_release(version:ver, patched:"8.4(7.9)"))
{
  temp_flag++;
  fixed_ver = "8.4(7)9";
}

else if (ver =~ "^8\.6[^0-9]" && check_asa_release(version:ver, patched:"8.6(1.13)"))
{
  temp_flag++;
  fixed_ver = "8.6(1)13";
}

else if (ver =~ "^9\.0[^0-9]" && check_asa_release(version:ver, patched:"9.0(4.1)"))
{
  temp_flag++;
  fixed_ver = "9.0(4)1";
}

else if (ver =~ "^9\.1[^0-9]" && check_asa_release(version:ver, patched:"9.1(4.3)"))
{
  temp_flag++;
  fixed_ver = "9.1(4)3";
}

if (local_check)
{
  if (temp_flag)
  {
    temp_flag = 0;
    # Check if SSL VPN (WebVPN) feature is 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))
        temp_flag = 1;
    }
    else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
  }
}

if (temp_flag)
{
  report +=
    '\n    Cisco bug ID      : ' + cbi +
    '\n    Installed release : ' + ver +
    '\n    Fixed release     : ' + fixed_ver + '\n';
  flag++;
}

# #################################################
# CSCua85555
# #################################################
cbi = "CSCua85555";
temp_flag = 0;

if (ver =~ "^8\.2[^0-9]" && check_asa_release(version:ver, patched:"8.2(5.47)"))
{
  temp_flag++;
  fixed_ver = "8.2(5)47";
}

else if (ver =~ "^8\.3[^0-9]" && check_asa_release(version:ver, patched:"8.3(2.40)"))
{
  temp_flag++;
  fixed_ver = "8.3(2)40";
}

else if (ver =~ "^8\.4[^0-9]" && check_asa_release(version:ver, patched:"8.4(7.3)"))
{
  temp_flag++;
  fixed_ver = "8.4(7)3";
}

else if (ver =~ "^8\.6[^0-9]" && check_asa_release(version:ver, patched:"8.6(1.13)"))
{
  temp_flag++;
  fixed_ver = "8.6(1)13";
}

else if (ver =~ "^9\.0[^0-9]" && check_asa_release(version:ver, patched:"9.0(3.8)"))
{
  temp_flag++;
  fixed_ver = "9.0(3)8";
}

else if (ver =~ "^9\.1[^0-9]" && check_asa_release(version:ver, patched:"9.1(3.2)"))
{
  temp_flag++;
  fixed_ver = "9.1(3)2";
}


if (local_check)
{
  if (temp_flag)
  {
    temp_flag = 0;
    # Check if SSL VPN (WebVPN) feature is 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))
      {
        # Versions 8.2.x and 8.3.x are not affected if HostScan feature is enabled AND
        # certificate-only authentication is used for SSL VPN authentication
        if (ver =~ "^8\.[23][^0-9]")
        {

          buf = cisco_command_kb_item(
            "Host/Cisco/Config/show-webvpn-csd-hostscan",
            "show webvpn csd hostscan"
          );
          if (check_cisco_result(buf))
          {
            if (!preg(multiline:TRUE, pattern:"and enabled", string:buf))
            {

              buf = cisco_command_kb_item(
                "Host/Cisco/Config/show_running-config_all_tunnel-group",
                "show running-config all tunnel-group"
              );
              if (check_cisco_result(buf))
              {
                if (preg(multiline:TRUE, pattern:"authentication (aaa )?certificate", string:buf))
                  temp_flag = 1;
              }
              else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
            }
          }
          else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
        }

        # Check if 'authorization-required' is enabled in *ANY* tunnel group
        buf = cisco_command_kb_item(
          "Host/Cisco/Config/show_running-config_all_tunnel-group",
          "show running-config all tunnel-group"
        );
        if (check_cisco_result(buf))
        {
          if (!preg(multiline:TRUE, pattern:"^\s*authorization-required", string:buf))
            temp_flag = 1;
        }
        else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
      }
    }
    else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
  }
}

if (temp_flag)
{
  report +=
    '\n    Cisco bug ID      : ' + cbi +
    '\n    Installed release : ' + ver +
    '\n    Fixed release     : ' + fixed_ver + '\n';
  flag++;
}

# #################################################
# CSCuh44052
# #################################################
cbi = "CSCuh44052";
temp_flag = 0;

if (ver =~ "^8\.2[^0-9]" && check_asa_release(version:ver, patched:"8.2(5.48)"))
{
  temp_flag++;
  fixed_ver = "8.2(5)48";
}

if (ver =~ "^8\.4[^0-9]" && check_asa_release(version:ver, patched:"8.4(6.5)"))
{
  temp_flag++;
  fixed_ver = "8.4(6.5)";
}

if (ver =~ "^9\.0[^0-9]" && check_asa_release(version:ver, patched:"9.0(3.1)"))
{
  temp_flag++;
  fixed_ver = "9.0(3)1";
}

if (ver =~ "^9\.1[^0-9]" && check_asa_release(version:ver, patched:"9.1(2.5)"))
{
  temp_flag++;
  fixed_ver = "9.1(2)5";
}

if (local_check)
{
  if (temp_flag)
  {
    temp_flag = 0;
    buf = cisco_command_kb_item(
      "Host/Cisco/Config/show_service-policy-include-sip",
      "show service-policy | include sip"
    );
    if (check_cisco_result(buf))
    {
      if (preg(multiline:TRUE, icase:TRUE, pattern:"Inspect: sip", string:buf))
        temp_flag = 1;
    }
    else if (cisco_needs_enable(buf)) {temp_flag = 1; override = 1; }
  }
}

if (temp_flag)
{
  report +=
    '\n    Cisco bug ID      : ' + cbi +
    '\n    Installed release : ' + ver +
    '\n    Fixed release     : ' + fixed_ver + '\n';
  flag++;
}


if (flag)
{
  security_hole(port:0, extra:report + cisco_caveat(override));
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References