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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1611 APSB21-29 Security update available for Adobe Acrobat and Reader 12 May 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Adobe Acrobat Adobe Reader Publisher: Adobe Operating System: Windows Mac OS Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Unknown/Unspecified Denial of Service -- Existing Account Read-only Data Access -- Unknown/Unspecified Reduced Security -- Unknown/Unspecified Resolution: Patch/Upgrade CVE Names: CVE-2021-28565 CVE-2021-28564 CVE-2021-28562 CVE-2021-28561 CVE-2021-28560 CVE-2021-28559 CVE-2021-28558 CVE-2021-28557 CVE-2021-28555 CVE-2021-28553 CVE-2021-28550 CVE-2021-21086 CVE-2021-21044 CVE-2021-21038 Reference: ESB-2021.0443 Original Bulletin: https://helpx.adobe.com/security/products/acrobat/apsb21-29.html Comment: Adobe has received a report that CVE-2021-28550 has been exploited in the wild in limited attacks targeting Adobe Reader users on Windows. - --------------------------BEGIN INCLUDED TEXT-------------------- 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 Windows versions Acrobat Reader DC Continuous 2021.001.20150 and earlier Windows versions Continuous 2021.001.20149 and earlier Acrobat DC macOS versions 2021.001.20149 and earlier Acrobat Reader DC Continuous macOS versions Acrobat 2020 Classic 2020.001.30020 and earlier Windows & 2020 versions macOS Acrobat Reader Classic 2020.001.30020 and earlier Windows & 2020 2020 versions macOS Acrobat 2017 Classic 2017.011.30194 and earlier Windows & 2017 versions macOS Acrobat Reader Classic 2017.011.30194 and earlier Windows & 2017 2017 versions 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: o Users can update their product installations manually by choosing Help > Check for Updates. o The products will update automatically, without requiring user intervention, when updates are detected. o The full Acrobat Reader installer can be downloaded from the Acrobat Reader Download Center . For IT administrators (managed environments): o Refer to the specific release note version for links to installers. o 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 Platform Priority Availability Versions Rating Acrobat DC Continuous 2021.001.20155 Windows and 1 Release macOS Notes Acrobat Reader Continuous 2021.001.20155 Windows and 1 Release DC macOS Notes Acrobat 2020 Classic 2020.001.30025 Windows and 1 Release 2020 macOS Notes Acrobat Reader Classic 2020.001.30025 Windows and 1 Release 2020 2020 macOS Notes Acrobat 2017 Classic 2017.011.30196 Windows and 1 Release 2017 macOS Notes Acrobat Reader Classic 2017.011.30196 Windows and 1 Release 2017 2017 macOS Notes Vulnerability Details +-------------------------+---------------------+---------+-------------------+ | Vulnerability Category |Vulnerability Impact |Severity | CVE Number | +-------------------------+---------------------+---------+-------------------+ |Buffer overflow |Arbitrary code |Important|CVE-2021-28561 | | |execution | | | +-------------------------+---------------------+---------+-------------------+ |Heap-based Buffer |Arbitrary code |Critical |CVE-2021-28560 | |Overflow |execution | | | +-------------------------+---------------------+---------+-------------------+ |Heap-based Buffer |Arbitrary code |Important|CVE-2021-28558 | |Overflow |execution | | | +-------------------------+---------------------+---------+-------------------+ |Out-of-bounds Read |Memory leak |Critical |CVE-2021-28557 | +-------------------------+---------------------+---------+-------------------+ |Out-of-bounds Read |Arbitrary file system|Important|CVE-2021-28555 | | |read | | | +-------------------------+---------------------+---------+-------------------+ |Out-of-bounds Read |Arbitrary code |Critical |CVE-2021-28565 | | |execution | | | +-------------------------+---------------------+---------+-------------------+ |Out-of-bounds Write |Arbitrary code |Critical |CVE-2021-28564 | | |execution | | | +-------------------------+---------------------+---------+-------------------+ | | | |CVE-2021-21044 | | |Arbitrary code | | | |Out-of-bounds Write |execution |Critical |CVE-2021-21038 | | | | | | | | | |CVE-2021-21086 | +-------------------------+---------------------+---------+-------------------+ |Exposure of Private |Privilege escalation |Important|CVE-2021-28559 | |Information | | | | +-------------------------+---------------------+---------+-------------------+ | | | |CVE-2021-28562 | | |Arbitrary code | | | |Use After Free |execution |Critical |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. o Anonymously reported (CVE-2021-28550) o Aleksandar Nikolic of Cisco Talos. (CVE-2021-28562) o Xu peng (xupeng_1231) (CVE-2021-28561) o chutchut (CVE-2021-28559) o fr0zenrain of Baidu Security (CVE-2021-28560) o Haboob Labs (CVE-2021-28557, CVE-2021-28564, CVE-2021-28565, CVE-2021-28553, , CVE-2021-28558, CVE-2021-28555) - --------------------------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. 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