Vulnerabilities > CVE-2019-4322 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in IBM DB2

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
ibm
CWE-119
nessus
NVD
Published: 2019-07-01
Updated: 2023-03-03

Summary

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, and 11.1 is vulnerable to a buffer overflow, which could allow an authenticated local attacker to execute arbitrary code on the system as root. IBM X-Force ID: 161202.

Vulnerable Configurations

Part Description Count
Application
Ibm
4
OS
Hp
1
OS
Ibm
1
OS
Linux
1
OS
Microsoft
1
OS
Oracle
1

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.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyDatabases
    NASL idDB2_1114FP4A_NIX.NASL
    descriptionAccording to its version, the installation of IBM DB2 running on the remote host is either 9.7 prior to Fix Pack 11 Special Build 38744, 10.1 prior to Fix Pack 6 Special Build 38745, 10.5 prior to Fix Pack 10 Special Build 38746, or 11.1 prior to Mod 4 Fix Pack 5. It is, therefore, affected by a local privilege escalation vulnerability due to multiple buffer overflow vulnerabilities in DB2.
    last seen2020-03-17
    modified2019-07-12
    plugin id126635
    published2019-07-12
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/126635
    titleIBM DB2 9.7 < FP11 Special Build 38744 / 10.1 < FP6 Special Build 38745 / 10.5 < FP10 Special Build 38746 / 11.1 < M4FP5 Buffer Overflow Vulnerability (UNIX)
    code
    #
# (C) Tenable Network Security, Inc.
#
include('compat.inc');

if (description)
{
  script_id(126635);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/28");

  script_cve_id(
    "CVE-2019-4014",
    "CVE-2019-4101",
    "CVE-2019-4102",
    "CVE-2019-4154",
    "CVE-2019-4322",
    "CVE-2019-4386"
  );
  script_bugtraq_id(
    107686,
    109002,
    109019,
    109021,
    109024,
    109026
  );

  script_name(english:"IBM DB2 9.7 < FP11 Special Build 38744 / 10.1 < FP6 Special Build 38745 / 10.5 < FP10 Special Build 38746 / 11.1 < M4FP5 Buffer Overflow Vulnerability (UNIX)");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by a local privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its version, the installation of IBM DB2 running on the remote host is either 9.7 prior to Fix Pack 11 
Special Build 38744, 10.1 prior to Fix Pack 6 Special Build 38745, 10.5 prior to Fix Pack 10 Special Build 38746, or 
11.1 prior to Mod 4 Fix Pack 5. It is, therefore, affected by a local privilege escalation vulnerability due to 
multiple buffer overflow vulnerabilities in DB2.");
  # https://www-01.ibm.com/support/docview.wss?uid=ibm10884444
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?08deaf85");
  # https://www-01.ibm.com/support/docview.wss?uid=ibm10878793
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2d40f485");
  # https://www.ibm.com/support/docview.wss?uid=ibm10880741
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6dbf8ac9");
  # https://www.ibm.com/support/docview.wss?uid=ibm10880743
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?88af628b");
  # https://www.ibm.com/support/docview.wss?uid=ibm10880737
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f540ba24");
  # https://www.ibm.com/support/docview.wss?uid=ibm10886809
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b6f97008");
  script_set_attribute(attribute:"solution", value:"Apply the appropriate IBM DB2 Fix Pack or Special Build based on 
  the most recent fix pack level for your branch.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/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:L/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:"cvss_score_source", value:"CVE-2019-4014");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("db2_installed.nbin");
  script_require_keys("installed_sw/DB2 Server");
  script_exclude_keys("SMB/db2/Installed");

  exit(0);
}

include('audit.inc');
include('db2_report_func.inc');
include('global_settings.inc');
include('install_func.inc');
include('misc_func.inc');

# The remote host's OS is Windows, not Linux.
if (get_kb_item('SMB/db2/Installed'))
  audit(AUDIT_OS_NOT, 'Linux', 'Windows');

app = 'DB2 Server';
install = get_single_install(app_name:app, exit_if_unknown_ver:TRUE);
port = install['port'];

if (!port)
  port = 0;

# DB2 has an optional OpenSSH server that will run on windows. 
# We need to exit out if we picked up the windows installation that way.
if ('Windows' >< install['platform'])
  audit(AUDIT_HOST_NOT, 'a Linux based operating system');

version = kb_version = install['version'];
path = install['path'];
special_build = install['special_build'];

if(empty_or_null(special_build))
  special_build = 'None';

if(special_build != 'None')
  kb_version += ' with Special Build ' + special_build;

fix_ver = NULL;
fix_build = NULL;

if (version =~ '^9\\.7\\.')
{
  fix_ver = '9.7.0.11';
  fix_build = '38744';
}
else if (version =~ '^10\\.1\\.')
{
  fix_ver = '10.1.0.6';
  fix_build = '38745';
}
else if (version =~ '^10\\.5\\.')
{
  fix_ver = '10.5.0.10';
  fix_build = '38746';
}
else if (version =~ '^11\\.1\\.')
{
  fix_ver = '11.1.4.5';
}
else
  audit(AUDIT_INST_PATH_NOT_VULN, app, kb_version, path);

vuln = FALSE;
cmp = ver_compare(ver:version, fix:fix_ver, strict:FALSE);

# less than current fix pack                                      
if (cmp < 0)
{
  vuln = TRUE;
}
else if (cmp == 0 && !isnull(fix_build))
{
  # missing special build or less than current special build      
  if (special_build == 'None' || ver_compare(ver:special_build, fix:fix_build, strict:FALSE) < 0)
    vuln = TRUE;
}

if (!vuln)
  audit(AUDIT_INST_PATH_NOT_VULN, app, kb_version, path);

report_db2(
  severity          : SECURITY_HOLE,
  port              : port,
  product           : app,
  path              : path,
  installed_version : version,
  fixed_version     : fix_ver,
  special_installed : special_build,
  special_fix       : fix_build
);
  • NASL familyWindows
    NASL idDB2_1114FP4A_WIN.NASL
    descriptionAccording to its version, the installation of IBM DB2 running on the remote host is either 9.7 prior to Fix Pack 11 Special Build 38744, 10.1 prior to Fix Pack 6 Special Build 38745, 10.5 prior to Fix Pack 10 Special Build 38746, or 11.1 prior to 11.1.4 Fix Pack 4a Special Build 38747. It is, therefore, affected by a local privilege escalation vulnerability due to multiple buffer overflow vulnerabilities in DB2.
    last seen2020-03-17
    modified2019-07-12
    plugin id126636
    published2019-07-12
    reporterThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/126636
    titleIBM DB2 9.7 < FP11 Special Build 38744 / 10.1 < FP6 Special Build 38745 / 10.5 < FP10 Special Build 38746 / 11.1.4 < FP4a Special Build 38747 Buffer Overflow Vulnerability (Windows)
    code
    #
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(126636);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/02/28");

  script_cve_id(
    "CVE-2019-4014",
    "CVE-2019-4101",
    "CVE-2019-4102",
    "CVE-2019-4154",
    "CVE-2019-4322",
    "CVE-2019-4386"
  );
  script_bugtraq_id(
    107686,
    109002,
    109019,
    109021,
    109024,
    109026
  );

  script_name(english:"IBM DB2 9.7 < FP11 Special Build 38744 / 10.1 < FP6 Special Build 38745 / 10.5 < FP10 Special Build 38746 / 11.1.4 < FP4a Special Build 38747 Buffer Overflow Vulnerability (Windows)");
  script_summary(english:"Checks the DB2 signature.");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by a local privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its version, the installation of IBM DB2 running on the remote host is either
9.7 prior to Fix Pack 11 Special Build 38744, 10.1 prior to Fix Pack 6 Special Build 38745, 10.5 prior
to Fix Pack 10 Special Build 38746, or 11.1 prior to 11.1.4 Fix Pack 4a Special Build 38747. It is, 
therefore, affected by a local privilege escalation vulnerability due to multiple buffer overflow 
vulnerabilities in DB2.");
  # https://www-01.ibm.com/support/docview.wss?uid=ibm10884444
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?08deaf85");
  # https://www-01.ibm.com/support/docview.wss?uid=ibm10878793
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2d40f485");
  # https://www.ibm.com/support/docview.wss?uid=ibm10880741
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6dbf8ac9");
  # https://www.ibm.com/support/docview.wss?uid=ibm10880743
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?88af628b");
  # https://www.ibm.com/support/docview.wss?uid=ibm10880737
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f540ba24");
  # https://www.ibm.com/support/docview.wss?uid=ibm10886809
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b6f97008");
  # https://www.ibm.com/blogs/psirt/ibm-security-bulletin-multiple-buffer-overflow-vulnerabilities-exist-in-ibm-db2-leading-to-privilege-escalation-cve-2019-4322/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4540cf8f");
  script_set_attribute(attribute:"solution", value:
"Apply the appropriate IBM DB2 Fix Pack or Special Build based on the
most recent fix pack level for your branch.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/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:L/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:"cvss_score_source", value:"CVE-2019-4014");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/06/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/12");

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

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

  script_copyright(english:"This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("db2_and_db2_connect_installed.nbin");
  script_require_keys("SMB/db2/Installed");

  exit(0);
}

include('audit.inc');
include('global_settings.inc');
include('install_func.inc');
include('misc_func.inc');
include('db2_report_func.inc');

app = 'DB2 Server';

# linux uses register_install, so we need to check this KB item
if(!get_kb_item('SMB/db2/Installed')) audit(AUDIT_NOT_INST, app);

install = get_single_install(app_name:app, exit_if_unknown_ver:TRUE);
version = report_version = install['version'];

special_build = install['special_build'];
if (empty_or_null(special_build)) special_build = 'None';
if (special_build != 'None') report_version += ' with Special Build ' + special_build;

path = install['path'];

fix_ver = NULL;
fix_build = NULL;

if (version =~ '^9\\.7\\.')
{
  fix_ver = '9.7.1100.352';
  fix_build = '38744';
}
else if (version =~ '^10\\.1\\.')
{
  fix_ver = '10.1.600.580';
  fix_build = '38745';
}
else if (version =~ '^10\\.5\\.')
{
  fix_ver = '10.5.1000.898';
  fix_build = '38746';
}
else if (version =~ '^11\\.1\\.')
{
  fix_ver = '11.1.4041.600';
  fix_build = '38747';
}
else
  audit(AUDIT_INST_PATH_NOT_VULN, app, report_version, path);

vuln = FALSE;
cmp = ver_compare(ver:version, fix:fix_ver, strict:FALSE);
# less than current fix pack
if (cmp < 0)
  vuln = TRUE;
else if (cmp == 0 && !isnull(fix_build))
{
  # missing special build or less than current special build      
  if (special_build == 'None' || ver_compare(ver:special_build, fix:fix_build, strict:FALSE) < 0)
    vuln = TRUE;
}

if (!vuln)
  audit(AUDIT_INST_PATH_NOT_VULN, app, report_version, path);

port = get_kb_item('SMB/transport');
if (!port) port = 445;

report_db2(
    severity          : SECURITY_HOLE,
    port              : port,
    product           : app,
    path              : path,
    installed_version : version,
    fixed_version     : fix_ver,
    special_installed : special_build,
    special_fix       : fix_build);

References