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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.4118.2 IBM Db2 could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. (CVE-2020-4739) 8 December 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: IBM DB2 Publisher: IBM Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-4739 Original Bulletin: https://www.ibm.com/support/pages/node/6370023 Revision History: December 8 2020: Vendor added URLs for updates to advisory November 20 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- IBM(R) Db2(R) could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. (CVE-2020-4739) Summary IBM DB2 on Windows could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. By placing a specially crafted file in a compromised folder, an attacker could exploit this vulnerability to execute arbitrary code on the system. Vulnerability Details CVEID: CVE-2020-4739 DESCRIPTION: IBM DB2 Accessories Suite for Linux, UNIX, and Windows, DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. By placing a specially crafted file in a compromised folder, an attacker could exploit this vulnerability to execute arbitrary code on the system. CVSS Base score: 7.8 CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/ 188149 for the current score. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) Affected Products and Versions All fix pack levels of IBM Db2 V9.7, V10.1, V10.5, V11.1, and V11.5 editions on Windows are affected. Linux and Unix are not affected. Remediation/Fixes Customers running any vulnerable fixpack level of an affected Program can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent fixpack level for each impacted release: V9.7 FP11, V10.1 FP6, V10.5 FP11, 11.1 FP5, and V11.5.4. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability. +-------+----------------+-------+--------------------------------------------+ |Release|Fixed in fix |APAR |Download URL | | |pack | | | +-------+----------------+-------+--------------------------------------------+ |V9.7 |TBD |IT34241|Special Build for V9.7 FP11: | | | | | | | | | |Windows 32-bit, x86 | | | | |Windows 64-bit, x86 | | | | | | | | | | | +-------+----------------+-------+--------------------------------------------+ |V10.1 |TBD |IT34240|Special Build for V10.1 FP6: | | | | | | | | | |Windows 32-bit, x86 | | | | |Windows 64-bit, x86 | +-------+----------------+-------+--------------------------------------------+ |V10.5 |TBD |IT34239|Special Build for V10.5 FP11: | | | | | | | | | |Windows 32-bit, x86 | | | | |Windows 64-bit, x86 | +-------+----------------+-------+--------------------------------------------+ |V11.1 |TBD |IT34238|Special Build for V11.1 FP5: | | | | | | | | | |Windows 32-bit, x86 | | | | |Windows 64-bit, x86 | +-------+----------------+-------+--------------------------------------------+ |V11.5 |11.5.5.0 |IT34221|Build for V11.5.5 GA: | | | | | | | | | |https://www.ibm.com/support/pages/node/ | | | | |6368787 | +-------+----------------+-------+--------------------------------------------+ Workarounds and Mitigations None Acknowledgement This vulnerability was reported to IBM by Hou JingYi (@hjy79425575) of Qihoo 360 CERT Change History 7 Dec 2020: URL for 9.7 Windows-64 updated 30 Nov 2020: Update URL for DB2 10.5 26 Nov 2020: URLs added for DB2 9.7 19 Nov 2020: URLs added for DB2 10.1 18 Nov 2020: Initial Publication *The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin. Disclaimer According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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