Vulnerabilities > CVE-2013-6744 - Permissions, Privileges, and Access Controls vulnerability in IBM DB2

047910
CVSS 8.5 - HIGH
Attack vector
NETWORK
Attack complexity
MEDIUM
Privileges required
SINGLE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
ibm
microsoft
CWE-264
nessus
NVD
Published: 2014-05-30
Updated: 2017-08-29

Summary

The Stored Procedure infrastructure in IBM DB2 9.5, 9.7 before FP9a, 10.1 before FP3a, and 10.5 before FP3a on Windows allows remote authenticated users to gain privileges by leveraging the CONNECT privilege and the CREATE_EXTERNAL_ROUTINE authority.

Vulnerable Configurations

Part Description Count
Application
Ibm
18
OS
Microsoft
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Nessus

  • NASL familyDatabases
    NASL idDB2_SPI_PRIV_ESC_WINDOWS.NASL
    descriptionAccording to its version, the installation of IBM DB2 running on the remote host is affected by a privilege escalation vulnerability. An error exists related to the Stored Procedure infrastructure and the
    last seen2020-06-01
    modified2020-06-02
    plugin id76116
    published2014-06-18
    reporterThis script is Copyright (C) 2014-2018 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/76116
    titleIBM DB2 Stored Procedure Infrastructure Privilege Escalation Vulnerability
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(76116);
  script_version("1.9");
  script_cvs_date("Date: 2018/07/06 11:26:06");

  script_cve_id("CVE-2013-6744");
  script_bugtraq_id(67616);

  script_name(english:"IBM DB2 Stored Procedure Infrastructure Privilege Escalation Vulnerability");
  script_summary(english:"Checks DB2 signature.");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by a privilege escalation
vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its version, the installation of IBM DB2 running on the
remote host is affected by a privilege escalation vulnerability.

An error exists related to the Stored Procedure infrastructure and the
'CREATE_EXTERNAL_ROUTINE' authority that allows an authenticated user
to escalate privileges.");
  # Advisory
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21673947");
  script_set_attribute(attribute:"solution", value:
"Apply IBM DB2 version 9.7 Fix Pack 9a, 10.1 Fix Pack 3a, 10.5 Fix Pack
3a, or 10.5 Fix Pack 4.

Alternatively, in the case of DB2 version 9.5 Fix Pack 9 or Fix Pack
10, 9.7 Fix Pack 8, and 10.5 Fix Pack 2, contact the vendor to obtain
a special build with the interim fix.

Additionally, note that users of DB2 version 9.1 installations that
are under an extended support contract may contact vendor support to
obtain a patch.");
  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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/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:"2014/01/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/05/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:db2");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2014-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("db2_das_detect.nasl");
  script_require_ports("Services/db2das", 523);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("db2_report_func.inc");

port = get_service(svc:"db2das", default:523, exit_on_fail:TRUE);

level = get_kb_item_or_exit("DB2/" + port + "/Level");
if (level !~ "^10\.[15]\." && level !~ "^9\.[157]\.")
  audit(AUDIT_NOT_LISTEN, "DB2 9.1 / 9.5 / 9.7 / 10.1 / 10.5", port);

platform = get_kb_item_or_exit("DB2/"+port+"/Platform");
platform_name = get_kb_item("DB2/"+port+"/Platform_Name");
if (isnull(platform_name))
{
  platform_name = platform;
  report_phrase = "platform " + platform;
}
else
  report_phrase = platform_name;

report_fixed_level = NULL;

# Windows 32-bit/64-bit are affected
if (platform == 5 || platform == 23)
{
  # v9.1
  if (level =~ "^9\.1\." && report_paranoia > 1)
        report_fixed_level = 'See solution';

  # v9.5 <= 9.5 FP10
  else if (level =~ "^9\.5\.")
  {
    fixed_level = '9.5.1000.163';
    if (ver_compare(ver:level, fix:fixed_level) <= 0)
    {
      # If not paranoid and at 9.5.900.456/9.5.1000.163 already,
      # do not report - we cannot tell if special fix build is there.
      if (
        (level == '9.5.900.456' || level == '9.5.1000.163')
        &&
        report_paranoia < 2
      )
        exit(1, "Nessus is unable to determine if the patch has been applied or not.");
      else
        report_fixed_level = 'See solution';
    }
  }

  # v9.7 fp8 (requires special build)
  else if (
    level =~ "^9\.7\.8\d\d\." &&
    ver_compare(ver:level, fix:'9.7.800.717') <= 0
  )
  {
    # Do not report if at FP8 and not paranoid
    if (level == '9.7.800.717' && report_paranoia < 2)
      exit(1, "Nessus is unable to determine if the patch has been applied or not.");
    else
      report_fixed_level = 'See solution';
  }

  # v9.7 fp9a
  else if (
    level =~ "^9\.7\." &&
    ver_compare(ver:level, fix:'9.7.901.409') == -1
  )
    report_fixed_level = '9.7.901.409 (9.7 Fix Pack 9a)';
  # 10.1 FP3a
  else if (
    level =~ "^10\.1\.3\d\d\." &&
    ver_compare(ver:level, fix:'10.1.301.770') == -1
  )
    report_fixed_level = '10.1.301.770 (10.1 Fix Pack 3a) / 10.1.400.766 (10.1 Fix Pack 4)';
  # 10.5 FP2 (requires special build)
  else if (
    level =~ "^10\.5\.2\d\d\." &&
    ver_compare(ver:level, fix:'10.5.200.109') <= 0
  )
  {
    # Do not report if at FP2 and not paranoid
    if (level == '10.5.200.109' && report_paranoia < 2)
      exit(1, "Nessus is unable to determine if the patch has been applied or not.");
    else
      report_fixed_level = 'See solution';
  }
  # 10.5 FP3a
  else if (
    level =~ "^10\.5\." &&
    ver_compare(ver:level, fix:'10.5.301.84') == -1
  )
    report_fixed_level = '10.5.301.84 (10.5 Fix Pack 3a)';
  else
    exit(1, "Nessus is unable to determine if the patch has been applied or not.");
}
# Others (not affected, so audit)
else if (
  # Linux, 2.6 kernel 32/64-bit
  platform == 18 ||
  platform == 30 ||
  # AIX
  platform == 20
)
  audit(AUDIT_OS_NOT, "Microsoft Windows", "UNIX or Unix-like");
else
{
  info =
    'Nessus does not support version checks against ' + report_phrase + '.\n' +
    'To help us better identify vulnerable versions, please send the platform\n' +
    'number along with details about the platform, including the operating system\n' +
    'version, CPU architecture, and DB2 version to [email protected].\n';
  exit(1, info);
}

if (!isnull(report_fixed_level))
{
  report_db2(
      severity        : SECURITY_HOLE,
      port            : port,
      platform_name   : platform_name,
      installed_level : level,
      fixed_level     : report_fixed_level);
}
else audit(AUDIT_LISTEN_NOT_VULN, "DB2", port, level);
  • NASL familyDatabases
    NASL idDB2_97FP9A.NASL
    descriptionAccording to its version, the installation of DB2 9.7 running on the remote host is prior to Fix Pack 9a. It is, therefore, affected by one or more of the following vulnerabilities : - An unspecified error exists related to handling malformed certificate chains that allows denial of service attacks. (CVE-2013-6747) - A build error exists related to libraries in insecure locations that allows a local user to carry out privilege escalation attacks. Note that this issue does not affect the application when running on Microsoft Windows operating systems. (CVE-2014-0907) - An unspecified error exists related to the TLS implementation that allows certain error cases to cause 100% CPU utilization. (CVE-2014-0963)
    last seen2020-06-01
    modified2020-06-02
    plugin id76114
    published2014-06-18
    reporterThis script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/76114
    titleIBM DB2 9.7 < Fix Pack 9a Multiple Vulnerabilities
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(76114);
  script_version("1.9");
  script_cvs_date("Date: 2019/11/26");

  script_cve_id(
    "CVE-2013-6744",
    "CVE-2013-6747",
    "CVE-2014-0907",
    "CVE-2014-0963"
  );
  script_bugtraq_id(
    65156,
    67238,
    67616,
    67617
  );

  script_name(english:"IBM DB2 9.7 < Fix Pack 9a Multiple Vulnerabilities");
  script_summary(english:"Checks the DB2 signature.");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its version, the installation of DB2 9.7 running on the
remote host is prior to Fix Pack 9a. It is, therefore, affected by one
or more of the following vulnerabilities :

  - An unspecified error exists related to handling
    malformed certificate chains that allows denial
    of service attacks. (CVE-2013-6747)

  - A build error exists related to libraries in insecure
    locations that allows a local user to carry out
    privilege escalation attacks. Note that this issue does
    not affect the application when running on Microsoft
    Windows operating systems. (CVE-2014-0907)

  - An unspecified error exists related to the TLS
    implementation that allows certain error cases to cause
    100% CPU utilization. (CVE-2014-0963)");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21672100");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21671732");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21450666#9a");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg24037559");
  script_set_attribute(attribute:"solution", value:
"Apply IBM DB2 version 9.7 Fix Pack 9a or later.

Alternatively, in the case of DB2 Version 9.7 Fix Pack 8, contact the
vendor to obtain a special build with the interim fix.

Note that the vendor has posted a workaround for the build error issue
(CVE-2014-0907) involving the command 'sqllib/bin/db2chglibpath'.
Please consult the advisory for detailed instructions.");
  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_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2013-6744");

  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:"2014/01/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/06/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/06/18");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:db2");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2014-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("db2_das_detect.nasl");
  script_require_ports("Services/db2das", 523);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("db2_report_func.inc");

port = get_service(svc:"db2das", default:523, exit_on_fail:TRUE);

level = get_kb_item_or_exit("DB2/" + port + "/Level");
if (level !~ "^9\.7\.") audit(AUDIT_NOT_LISTEN, "DB2 9.7", port);

platform = get_kb_item_or_exit("DB2/"+port+"/Platform");
platform_name = get_kb_item("DB2/"+port+"/Platform_Name");
if (isnull(platform_name))
{
  platform_name = platform;
  report_phrase = "platform " + platform;
}
else
  report_phrase = platform_name;


vuln = FALSE;
# Windows 32-bit/64-bit
if (platform == 5 || platform == 23)
{
  fixed_level = '9.7.901.409';
  if (ver_compare(ver:level, fix:fixed_level) == -1)
    vuln = TRUE;

  # In the case of a non-paranoid scan and FP8,
  # do not report.
  # It's not clear if the special build will
  # change the build level.
  if (level == '9.7.800.717' && report_paranoia < 2)
    exit(1, "Nessus is unable to determine if the patch has been applied or not.");
}
# Others
else if (
  # Linux, 2.6 kernel 32/64-bit
  platform == 18 ||
  platform == 30 ||
  # AIX
  platform == 20
)
{
  fixed_level = '9.7.0.9';
  if (ver_compare(ver:level, fix:fixed_level) <= 0)
    vuln = TRUE;

  # If not paranoid and at 9.7.0.9/9.7.0.8 already,
  # do not report - we cannot tell if the special
  # build or FP9a is there.
  if ((level == fixed_level || level == '9.7.0.8') && report_paranoia < 2)
    exit(1, "Nessus is unable to determine if the patch has been applied or not.");
}
else
{
  info =
    'Nessus does not support version checks against ' + report_phrase + '.\n' +
    'To help us better identify vulnerable versions, please send the platform\n' +
    'number along with details about the platform, including the operating system\n' +
    'version, CPU architecture, and DB2 version to [email protected].\n';
  exit(1, info);
}

if (vuln)
{
  report_db2(
      severity        : SECURITY_HOLE,
      port            : port,
      platform_name   : platform_name,
      installed_level : level,
      fixed_level     : fixed_level);
}
else audit(AUDIT_LISTEN_NOT_VULN, "DB2", port, level);

References