Vulnerabilities > CVE-2016-0211 - Improper Input Validation vulnerability in IBM DB2 and DB2 Connect
Attack vector
NETWORK Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
LOW Summary
IBM DB2 9.7 through FP11, 9.8, 10.1 through FP5, and 10.5 through FP7 on Linux, UNIX, and Windows allows remote authenticated users to cause a denial of service (daemon crash) via a crafted DRDA message.
Vulnerable Configurations
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 family Windows NASL id DB2_CONNECT_97FP11_35317_WIN.NASL description According to its version, the installation of IBM DB2 Connect running on the remote Windows host is either 9.7 prior to fix pack 11 Special Build 35317, 10.1 prior to fix pack 5 Special Build 35316, or 10.5 prior to fix pack 7 Special Build 35315. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists in LUW related to the handling of DRDA messages. An authenticated, remote attacker can exploit this, via a specially crafted DRDA message, to cause the DB2 server to terminate abnormally. (CVE-2016-0211) - A denial of service vulnerability exists in LUW when handling SELECT statements with subqueries containing the AVG OLAP function that are applied to Oracle compatible databases. An authenticated, remote attacker can exploit this, via a specially crafted query, to cause the DB2 server to terminate abnormally. (CVE-2016-0215) Note that the IBM DB2 Connect installation is affected only if a local database has been created. last seen 2020-06-01 modified 2020-06-02 plugin id 91337 published 2016-05-26 reporter This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91337 title IBM DB2 Connect 9.7 < FP11 Special Build 35317 / 10.1 < FP5 Special Build 35316 / 10.5 < FP7 Special Build 35315 Multiple Vulnerabilities (Windows) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(91337); script_version("1.5"); script_cvs_date("Date: 2018/07/06 11:26:08"); script_cve_id( "CVE-2016-0211", "CVE-2016-0215" ); script_name(english:"IBM DB2 Connect 9.7 < FP11 Special Build 35317 / 10.1 < FP5 Special Build 35316 / 10.5 < FP7 Special Build 35315 Multiple Vulnerabilities (Windows)"); script_summary(english:"Checks the DB2 Connect 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 IBM DB2 Connect running on the remote Windows host is either 9.7 prior to fix pack 11 Special Build 35317, 10.1 prior to fix pack 5 Special Build 35316, or 10.5 prior to fix pack 7 Special Build 35315. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists in LUW related to the handling of DRDA messages. An authenticated, remote attacker can exploit this, via a specially crafted DRDA message, to cause the DB2 server to terminate abnormally. (CVE-2016-0211) - A denial of service vulnerability exists in LUW when handling SELECT statements with subqueries containing the AVG OLAP function that are applied to Oracle compatible databases. An authenticated, remote attacker can exploit this, via a specially crafted query, to cause the DB2 server to terminate abnormally. (CVE-2016-0215) Note that the IBM DB2 Connect installation is affected only if a local database has been created."); script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21979984"); script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21979986"); script_set_attribute(attribute:"solution", value: "Apply the appropriate IBM DB2 Connect Special Build based on the most recent fix pack level for your branch."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P"); 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:N/I:N/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:"2016/04/07"); script_set_attribute(attribute:"patch_publication_date", value:"2016/04/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/26"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"potential_vulnerability", value:"true"); script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:db2_connect"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Windows"); script_copyright(english:"This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("db2_and_db2_connect_installed.nbin"); script_require_keys("SMB/db2_connect/Installed"); exit(0); } include("audit.inc"); include("global_settings.inc"); include("install_func.inc"); include("misc_func.inc"); include("db2_report_func.inc"); if (report_paranoia < 2) audit(AUDIT_PARANOID); app = "DB2 Connect Server"; if(!get_kb_item("SMB/db2_connect/Installed")) audit(AUDIT_NOT_INST, app); install = get_single_install(app_name:app, exit_if_unknown_ver:TRUE); kb_version = install['version']; ver_parts = split(kb_version, sep:".", keep:FALSE); if (len(ver_parts) < 3) audit(AUDIT_VER_NOT_GRANULAR, app, kb_version); # concatenate version parts version = ver_parts[0]+"."+ver_parts[1]+"."+ver_parts[2]; fix_ver = NULL; fix_build = NULL; if (version =~ "^9\.7\.") { fix_ver = "9.7.1100"; fix_build = "35317"; } else if (version =~ "^10\.1\.") { fix_ver = "10.1.500"; fix_build = "35316"; } else if (version =~ "^10\.5\.") { fix_ver = "10.5.700"; fix_build = "35315"; } path = install['path']; special_build = install['special_build']; info = ""; if (!isnull(fix_ver)) { 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) { # 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; } } # Report if vulnerable install was found. if (vuln) { port = get_kb_item("SMB/transport"); if (!port) port = 445; report_db2( severity : SECURITY_WARNING, port : port, product : app, installed_level : version, special_installed : special_build, fixed_version : fix_ver, special_fix : fix_build); } else { ver_str = kb_version; if (special_build != "None") ver_str += " with Special Build " + special_build; audit(AUDIT_INST_VER_NOT_VULN, app, ver_str); }NASL family Windows NASL id DB2_97FP11_35317_WIN.NASL description According to its version, the installation of IBM DB2 running on the remote Windows host is either 9.7 prior to fix pack 11 special build 35317, 10.1 prior to fix pack 5 special build 35316, or 10.5 prior to fix pack 7 special build 35315. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists in LUW related to the handling of DRDA messages. An authenticated, remote attacker can exploit this, via a specially crafted DRDA message, to cause the DB2 server to terminate abnormally. (CVE-2016-0211) - A denial of service vulnerability exists in LUW when handling SELECT statements with subqueries containing the AVG OLAP function that are applied to Oracle compatible databases. An authenticated, remote attacker can exploit this, via a specially crafted query, to cause the DB2 server to terminate abnormally. (CVE-2016-0215) last seen 2020-06-01 modified 2020-06-02 plugin id 91336 published 2016-05-26 reporter This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91336 title IBM DB2 9.7 < FP11 Special Build 35317 / 10.1 < FP5 Special Build 35316 / 10.5 < FP7 Special Build 35315 Multiple Vulnerabilities (Windows) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(91336); script_version("1.6"); script_cvs_date("Date: 2018/07/06 11:26:08"); script_cve_id( "CVE-2016-0211", "CVE-2016-0215" ); script_bugtraq_id(85979); script_name(english:"IBM DB2 9.7 < FP11 Special Build 35317 / 10.1 < FP5 Special Build 35316 / 10.5 < FP7 Special Build 35315 Multiple Vulnerabilities (Windows)"); 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 IBM DB2 running on the remote Windows host is either 9.7 prior to fix pack 11 special build 35317, 10.1 prior to fix pack 5 special build 35316, or 10.5 prior to fix pack 7 special build 35315. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists in LUW related to the handling of DRDA messages. An authenticated, remote attacker can exploit this, via a specially crafted DRDA message, to cause the DB2 server to terminate abnormally. (CVE-2016-0211) - A denial of service vulnerability exists in LUW when handling SELECT statements with subqueries containing the AVG OLAP function that are applied to Oracle compatible databases. An authenticated, remote attacker can exploit this, via a specially crafted query, to cause the DB2 server to terminate abnormally. (CVE-2016-0215)"); script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21979984"); script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21979986"); script_set_attribute(attribute:"solution", value: "Apply the appropriate IBM DB2 special build based on the most recent fix pack level for your branch."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P"); 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:N/I:N/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:"2016/04/07"); script_set_attribute(attribute:"patch_publication_date", value:"2016/04/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/26"); 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) 2016-2018 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); product = install['product']; if (product == "IBM Data Server Client") audit(AUDIT_INST_PATH_NOT_VULN, "IBM Data Server Client"); kb_version = install['version']; ver_parts = split(kb_version, sep:".", keep:FALSE); if (len(ver_parts) < 3) audit(AUDIT_VER_NOT_GRANULAR, app, kb_version); # concatenate version parts version = ver_parts[0]+"."+ver_parts[1]+"."+ver_parts[2]; fix_ver = NULL; fix_build = NULL; if (version =~ "^9\.7\.") { fix_ver = "9.7.1100"; fix_build = "35317"; } else if (version =~ "^10\.1\.") { fix_ver = "10.1.500"; fix_build = "35316"; } else if (version =~ "^10\.5\.") { fix_ver = "10.5.700"; fix_build = "35315"; } path = install['path']; special_build = install['special_build']; if (!isnull(fix_ver)) { 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) { # 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; } } # Report if vulnerable install was found if (vuln) { port = get_kb_item("SMB/transport"); if (!port) port = 445; report_db2( severity : SECURITY_WARNING, port : port, product : app, path : path, installed_version : version, special_installed : special_build, fixed_version : fix_ver, special_fix : fix_build); } else { ver_str = kb_version; if (special_build != "None") ver_str += " with special build " + special_build; audit(AUDIT_INST_VER_NOT_VULN, app, ver_str); }NASL family Databases NASL id DB2_97FP11_35317_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 35317, 10.1 prior to fix pack 5 Special Build 35316, or 10.5 prior to fix pack 7 Special Build 35315. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists in LUW related to the handling of DRDA messages. An authenticated, remote attacker can exploit this, via a specially crafted DRDA message, to cause the DB2 server to terminate abnormally. (CVE-2016-0211) - A denial of service vulnerability exists in LUW when handling SELECT statements with subqueries containing the AVG OLAP function that are applied to Oracle compatible databases. An authenticated, remote attacker can exploit this, via a specially crafted query, to cause the DB2 server to terminate abnormally. (CVE-2016-0215) last seen 2020-06-01 modified 2020-06-02 plugin id 91335 published 2016-05-26 reporter This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/91335 title IBM DB2 9.7 < FP11 Special Build 35317 / 10.1 < FP5 Special Build 35316 / 10.5 < FP7 Special Build 35315 Multiple Vulnerabilities (UNIX) code # # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(91335); script_version("1.5"); script_cvs_date("Date: 2018/07/06 11:26:06"); script_cve_id( "CVE-2016-0211", "CVE-2016-0215" ); script_name(english:"IBM DB2 9.7 < FP11 Special Build 35317 / 10.1 < FP5 Special Build 35316 / 10.5 < FP7 Special Build 35315 Multiple Vulnerabilities (UNIX)"); 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 IBM DB2 running on the remote host is either 9.7 prior to fix pack 11 Special Build 35317, 10.1 prior to fix pack 5 Special Build 35316, or 10.5 prior to fix pack 7 Special Build 35315. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists in LUW related to the handling of DRDA messages. An authenticated, remote attacker can exploit this, via a specially crafted DRDA message, to cause the DB2 server to terminate abnormally. (CVE-2016-0211) - A denial of service vulnerability exists in LUW when handling SELECT statements with subqueries containing the AVG OLAP function that are applied to Oracle compatible databases. An authenticated, remote attacker can exploit this, via a specially crafted query, to cause the DB2 server to terminate abnormally. (CVE-2016-0215)"); script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21979984"); script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=swg21979986"); script_set_attribute(attribute:"solution", value: "Apply the appropriate IBM DB2 Special Build based on the most recent fix pack level for your branch."); script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P"); 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:N/I:N/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:"2016/04/07"); script_set_attribute(attribute:"patch_publication_date", value:"2016/04/07"); script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/26"); 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) 2016-2018 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("global_settings.inc"); include("misc_func.inc"); include("install_func.inc"); include("db2_report_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_name = "DB2 Server"; install = get_single_install(app_name:app_name, exit_if_unknown_ver:TRUE); version = install['version']; path = install['path']; special_build = install['special_build']; 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, "Linux based operating system"); fix_ver = NULL; fix_build = NULL; if (version =~ "^9\.7\.") { fix_ver = "9.7.0.11"; fix_build = "35317"; } else if (version =~ "^10\.1\.") { fix_ver = "10.1.0.5"; fix_build = "35316"; } else if (version =~ "^10\.5\.") { fix_ver = "10.5.0.7"; fix_build = "35315"; } vuln = FALSE; if (!isnull(fix_ver)) { cmp = ver_compare(ver:version, fix:fix_ver, strict:FALSE); # less than current fix pack if(cmp < 0) vuln = TRUE; else if (cmp == 0) { # 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) { report_db2( severity : SECURITY_WARNING, port : port, product : app_name, path : path, installed_version : version, special_installed : special_build, fixed_version : fix_ver, special_fix : fix_build); } else { ver_str = version; if (special_build != "None") ver_str += " with Special Build " + special_build; audit(AUDIT_INST_PATH_NOT_VULN, app_name, ver_str, path); }
References
- http://www-01.ibm.com/support/docview.wss?uid=swg1IT12488
- http://www-01.ibm.com/support/docview.wss?uid=swg1IT13350
- http://www-01.ibm.com/support/docview.wss?uid=swg1IT12462
- http://www-01.ibm.com/support/docview.wss?uid=swg1IT12487
- http://www-01.ibm.com/support/docview.wss?uid=swg21979984
- http://www.securityfocus.com/bid/85979
- http://www.securitytracker.com/id/1035660