Vulnerabilities > CVE-2019-4102 - Inadequate Encryption Strength vulnerability in IBM DB2
Attack vector
NETWORK Attack complexity
HIGH Privileges required
NONE Confidentiality impact
HIGH Integrity impact
NONE Availability impact
NONE Summary
IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, and 11.0 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force ID: 158092.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | Ibm
| 35 |
| OS | 1 | |
| OS | 1 | |
| OS | 1 | |
| OS | 1 | |
| OS | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Brute Force In this attack, some asset (information, functionality, identity, etc.) is protected by a finite secret value. The attacker attempts to gain access to this asset by using trial-and-error to exhaustively explore all the possible secret values in the hope of finding the secret (or a value that is functionally equivalent) that will unlock the asset. Examples of secrets can include, but are not limited to, passwords, encryption keys, database lookup keys, and initial values to one-way functions. The key factor in this attack is the attackers' ability to explore the possible secret space rapidly. This, in turn, is a function of the size of the secret space and the computational power the attacker is able to bring to bear on the problem. If the attacker has modest resources and the secret space is large, the challenge facing the attacker is intractable. While the defender cannot control the resources available to an attacker, they can control the size of the secret space. Creating a large secret space involves selecting one's secret from as large a field of equally likely alternative secrets as possible and ensuring that an attacker is unable to reduce the size of this field using available clues or cryptanalysis. Doing this is more difficult than it sounds since elimination of patterns (which, in turn, would provide an attacker clues that would help them reduce the space of potential secrets) is difficult to do using deterministic machines, such as computers. Assuming a finite secret space, a brute force attack will eventually succeed. The defender must rely on making sure that the time and resources necessary to do so will exceed the value of the information. For example, a secret space that will likely take hundreds of years to explore is likely safe from raw-brute force attacks.
- Encryption Brute Forcing An attacker, armed with the cipher text and the encryption algorithm used, performs an exhaustive (brute force) search on the key space to determine the key that decrypts the cipher text to obtain the plaintext.
Nessus
NASL family Databases NASL id DB2_1114FP4A_NIX.NASL description 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. last seen 2020-03-17 modified 2019-07-12 plugin id 126635 published 2019-07-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126635 title 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) 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 family Windows NASL id DB2_1114FP4A_WIN.NASL description 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. last seen 2020-03-17 modified 2019-07-12 plugin id 126636 published 2019-07-12 reporter This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/126636 title 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) 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
- http://www.securityfocus.com/bid/109026
- http://www.securityfocus.com/bid/109026
- https://exchange.xforce.ibmcloud.com/vulnerabilities/158092
- https://exchange.xforce.ibmcloud.com/vulnerabilities/158092
- https://www.ibm.com/support/docview.wss?uid=ibm10880743
- https://www.ibm.com/support/docview.wss?uid=ibm10880743