==================================================================== CERT-Renater Note d'Information No. 2021/VULN273 _____________________________________________________________________ DATE : 12/05/2021 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S):Systems running Adobe Acrobat, Adobe Reader versions prior to 2021.001.20150, 2021.001.20149, 2020.001.30020, 2017.011.30194. ===================================================================== https://helpx.adobe.com/security/products/acrobat/apsb21-29.html _____________________________________________________________________ Security update available for Adobe Acrobat and Reader | APSB21-29 Bulletin ID Date Published Priority APSB21-29 May 11, 2021 1 Summary Adobe has released security updates for Adobe Acrobat and Reader for Windows and macOS. These updates address multiple critical and important vulnerabilities. Successful exploitation could lead to arbitrary code execution in the context of the current user. Adobe has received a report that CVE-2021-28550 has been exploited in the wild in limited attacks targeting Adobe Reader users on Windows. Affected Versions Product Track Affected Versions Platform Acrobat DC Continuous 2021.001.20150 and earlier versions          Windows Acrobat Reader DC Continuous 2021.001.20150 and earlier versions        Windows Acrobat DC Continuous 2021.001.20149 and earlier  versions    macOS Acrobat Reader DC Continuous 2021.001.20149 and earlier  versions          macOS Acrobat 2020 Classic 2020    2020.001.30020 and earlier versions Windows & macOS Acrobat Reader 2020 Classic 2020   2020.001.30020 and earlier versions Windows & macOS Acrobat 2017 Classic 2017 2017.011.30194 and earlier  versions        Windows & macOS Acrobat Reader 2017 Classic 2017 2017.011.30194  and earlier versions        Windows & macOS Solution Adobe recommends users update their software installations to the latest versions by following the instructions below.     The latest product versions are available to end users via one of the following methods:     Users can update their product installations manually by choosing Help > Check for Updates.      The products will update automatically, without requiring user intervention, when updates are detected.      The full Acrobat Reader installer can be downloaded from the Acrobat Reader Download Center.      For IT administrators (managed environments):      Refer to the specific release note version for links to installers.      Install updates via your preferred methodology, such as AIP-GPO, bootstrapper, SCUP/SCCM (Windows), or on macOS, Apple Remote Desktop and SSH.     Adobe categorizes these updates with the following priority ratings and recommends users update their installation to the newest version:     Product Track Updated Versions Platform Priority Rating Availability Acrobat DC Continuous 2021.001.20155     Windows and macOS 1 Release Notes Acrobat Reader DC Continuous 2021.001.20155   Windows and macOS 1 Release Notes Acrobat 2020 Classic 2020  2020.001.30025 Windows and macOS     1 Release Notes Acrobat Reader 2020 Classic 2020   2020.001.30025 Windows and macOS     1 Release Notes Acrobat 2017 Classic 2017 2017.011.30196  Windows and macOS 1 Release Notes Acrobat Reader 2017 Classic 2017 2017.011.30196  Windows and macOS 1 Release Notes Vulnerability Details Vulnerability Category Vulnerability Impact Severity CVE Number Buffer overflow Arbitrary code execution Important CVE-2021-28561 Heap-based Buffer Overflow Arbitrary code execution Critical CVE-2021-28560 Heap-based Buffer Overflow Arbitrary code execution Important CVE-2021-28558 Out-of-bounds Read Memory leak Critical CVE-2021-28557 Out-of-bounds Read Arbitrary file system read Important CVE-2021-28555 Out-of-bounds Read Arbitrary code execution Critical CVE-2021-28565 Out-of-bounds Write Arbitrary code execution Critical CVE-2021-28564 Out-of-bounds Write Arbitrary code execution Critical CVE-2021-21044 CVE-2021-21038 CVE-2021-21086 Exposure of Private Information Privilege escalation Important CVE-2021-28559 Use After Free Arbitrary code execution Critical CVE-2021-28562 CVE-2021-28550 CVE-2021-28553 Acknowledgements Adobe would like to thank the following for reporting the relevant issues and for working with Adobe to help protect our customers. Anonymously reported (CVE-2021-28550) Aleksandar Nikolic of Cisco Talos. (CVE-2021-28562) Xu peng (xupeng_1231) (CVE-2021-28561) chutchut (CVE-2021-28559) fr0zenrain of Baidu Security (CVE-2021-28560) Haboob Labs (CVE-2021-28557, CVE-2021-28564, CVE-2021-28565, CVE-2021-28553, , CVE-2021-28558, CVE-2021-28555) ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================