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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT Security Bulletin ASB-2021.0063 Microsoft Patch Tuesday update for Microsoft Office, Microsoft Office Services and Web Apps for April 2021 14 April 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Office Products Microsoft Office Services Microsoft Web App Products Operating System: Windows Mac OS Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Existing Account Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-28456 CVE-2021-28454 CVE-2021-28453 CVE-2021-28452 CVE-2021-28451 CVE-2021-28450 CVE-2021-28449 OVERVIEW Microsoft has released its monthly security patch update for the month of April 2021. This update resolves 7 vulnerabilities across the following products: [1] Microsoft 365 Apps for Enterprise for 32-bit Systems Microsoft 365 Apps for Enterprise for 64-bit Systems Microsoft Excel 2010 Service Pack 2 (32-bit editions) Microsoft Excel 2010 Service Pack 2 (64-bit editions) Microsoft Excel 2013 RT Service Pack 1 Microsoft Excel 2013 Service Pack 1 (32-bit editions) Microsoft Excel 2013 Service Pack 1 (64-bit editions) Microsoft Excel 2016 (32-bit edition) Microsoft Excel 2016 (64-bit edition) Microsoft Office 2010 Service Pack 2 (32-bit editions) Microsoft Office 2010 Service Pack 2 (64-bit editions) Microsoft Office 2013 RT Service Pack 1 Microsoft Office 2013 Service Pack 1 (32-bit editions) Microsoft Office 2013 Service Pack 1 (64-bit editions) Microsoft Office 2016 (32-bit edition) Microsoft Office 2016 (64-bit edition) Microsoft Office 2019 for 32-bit editions Microsoft Office 2019 for 64-bit editions Microsoft Office 2019 for Mac Microsoft Office Online Server Microsoft Office Web Apps 2010 Service Pack 2 Microsoft Office Web Apps Server 2013 Service Pack 1 Microsoft Outlook 2010 Service Pack 2 (32-bit editions) Microsoft Outlook 2010 Service Pack 2 (64-bit editions) Microsoft Outlook 2013 RT Service Pack 1 Microsoft Outlook 2013 Service Pack 1 (32-bit editions) Microsoft Outlook 2013 Service Pack 1 (64-bit editions) Microsoft Outlook 2016 (32-bit edition) Microsoft Outlook 2016 (64-bit edition) Microsoft SharePoint Enterprise Server 2013 Service Pack 1 Microsoft SharePoint Enterprise Server 2016 Microsoft SharePoint Foundation 2010 Service Pack 2 Microsoft SharePoint Server 2010 Service Pack 2 Microsoft SharePoint Server 2019 Microsoft Word 2010 Service Pack 2 (32-bit editions) Microsoft Word 2010 Service Pack 2 (64-bit editions) Microsoft Word 2013 RT Service Pack 1 Microsoft Word 2013 Service Pack 1 (32-bit editions) Microsoft Word 2013 Service Pack 1 (64-bit editions) Microsoft Word 2016 (32-bit edition) Microsoft Word 2016 (64-bit edition) IMPACT Microsoft has given the following details regarding these vulnerabilities. Details Impact Severity CVE-2021-28449 Remote Code Execution Important CVE-2021-28450 Denial of Service Important CVE-2021-28451 Remote Code Execution Important CVE-2021-28452 Remote Code Execution Important CVE-2021-28453 Remote Code Execution Important CVE-2021-28454 Remote Code Execution Important CVE-2021-28456 Information Disclosure Important MITIGATION Microsoft recommends updating the software with the version made available on the Microsoft Update Catalogue for the following Knowledge Base articles. [1]. KB2553491, KB2589361, KB3017810, KB3178639, KB3178643 KB4493170, KB4493185, KB4493198, KB4493201, KB4493208 KB4493215, KB4493218, KB4504701, KB4504705, KB4504709 KB4504712, KB4504714, KB4504715, KB4504716, KB4504719 KB4504721, KB4504722, KB4504723, KB4504724, KB4504726 KB4504727, KB4504729, KB4504733, KB4504735, KB4504738 KB4504739 REFERENCES [1] Microsoft Security Update Guidance https://portal.msrc.microsoft.com/en-us/security-guidance AusCERT has made every effort to ensure that the information contained in this document is accurate. However, the decision to use the information described is the responsibility of each user or organisation. 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. =========================================================================== 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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYHZWt+NLKJtyKPYoAQjZIQ//QL18k7P1+eYio7ij+zGA/QnN2NyHpT0/ tujaQ5fYoTZryUCHKaR6O5gmOR+nuE9Pf81xbhDKWqC8uSyJhxcBT1wEJ8IMAccX YvvAYMOB2Qxmuvzwc3rLvahPAtqsF7AUbTEtElJhvksjP61/QOOgZF+QuIVvGRE0 WLBE6PP78W3YN1rA8lOC1K0Hee1sI5d1F/3XKBEbPFfIIsV7owdoXabWR/putiMm 5no5rDnvdrIz0piiM+WVun92gUlTKbkxifVLovnwDmzYQ0oO8siFCElSf+B9Yu7Y 8qpLRES2ChPIRQzriN9fejQVO7ei2FOHHzFi39JYP4I5OlVWbuIthr5n7HZ1wyfz Y8AiAqSaQfdk+3qLbOx59vl2lwhaNEAlnOL8cPezu5ON5HGnbYFJrQiPytdee8NQ 7zGFEeYdwaIQO/npVW+aaC61HmU7S4Z7nGrWy907VC1AR7N/FwGtpxJ2VxRODmJy B3vAbwoXoTkw5uJyOI7Vtx8WVZiQD4vFGqOSnSKN0s/Alt/YH2p9Y1xIgACoPQrw sHAaFkJ5D7taBjLJTlEOOoZsANvgwJaKIiD4SWnzbp/MF3qp5eJZC5hYXsDRGxNO k+JKOr9wroRQ8bkzUyJVbtwUY1Y/t58y5a2wCUzaKQJBa6rAdAUQrbzQwLmjXsly tRCds2gDlEU= =BObN -----END PGP SIGNATURE-----