ESB-2021.2087 – [Win][Mac] Adobe Acrobat products: Execute arbitrary code/commands – Existing account

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AUSCERT External Security Bulletin Redistribution

ESB-2021.2087
APSB21-37 Security update available for Adobe Acrobat and Reader
10 June 2021

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AusCERT Security Bulletin Summary
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Product: Acrobat
Acrobat Reader
Publisher: Adobe
Operating System: Windows
Mac OS
Impact/Access: Execute Arbitrary Code/Commands — Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-28632 CVE-2021-28631 CVE-2021-28554
CVE-2021-28552 CVE-2021-28551

Original Bulletin:
https://helpx.adobe.com/security/products/acrobat/apsb21-37.html

– ————————–BEGIN INCLUDED TEXT——————–

Security update available for Adobe Acrobat and Reader | APSB21-37

Bulletin ID Date Published Priority

APSB21-37 June 08, 2021 2

Summary

Adobe has released security updates for Adobe Acrobat and Reader for Windows
and macOS. These updates address multiple critical vulnerabilities. Successful
exploitation could lead to arbitrary code execution in the context of the
current user.

Affected Versions

Product Track Affected Versions Platform

Acrobat DC Continuous 2021.001.20155 and earlier Windows and
versions macOS

Acrobat Reader DC Continuous 2021.001.20155 and earlier Windows and
versions macOS

Acrobat 2020 Classic 2020.001.30025 and earlier Windows & macOS
2020 versions

Acrobat Reader Classic 2020.001.30025 and earlier Windows & macOS
2020 2020 versions

Acrobat 2017 Classic 2017.011.30196 and earlier Windows & macOS
2017 versions

Acrobat Reader Classic 2017.011.30196 and earlier Windows & macOS
2017 2017 versions

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 2021.005.20148 Windows and 2 Release
macOS Notes

Acrobat Reader Continuous 2021.005.20148 Windows and 2 Release
DC macOS Notes

Acrobat 2020 Classic 2020.004.30005 Windows and 2 Release
2020 macOS Notes

Acrobat Reader Classic 2020.004.30005 Windows and 2 Release
2020 2020 macOS Notes

Acrobat 2017 Classic 2017.011.30197 Windows and 2 Release
2017 macOS Notes

Acrobat Reader Classic 2017.011.30197 Windows and 2 Release
2017 2017 macOS Notes

Vulnerability Details

+————-+————-+——–+—–+—————+——————+
| |Vulnerability| |CVSS | | |
|Vulnerability| Impact |Severity|base | CVSS vector | CVE Number |
| Category | | |score| | |
+————-+————-+——–+—–+—————+——————+
|Out-of-bounds|Arbitrary | | |CVSS:3.1/AV:L/ |CVE-2021-28554 |
|Read |code |Critical|7.8 |AC:L/PR:N/UI:R/| |
| |execution | | |S:U/C:H/I:H/A:H|CVE-2021-28551 |
|( CWE-125 ) | | | | | |
+————-+————-+——–+—–+—————+——————+
|Use After | | | | |CVE-2021-28552 |
|Free |Arbitrary | | |CVSS:3.1/AV:L/ | |
| |code |Critical|7.8 |AC:L/PR:N/UI:R/|CVE-2021-28631 |
|( CWE-416 ) |execution | | |S:U/C:H/I:H/A:H| |
| | | | | |CVE-2021-28632 |
+————-+————-+——–+—–+—————+——————+

Acknowledgements

Adobe would like to thank the following for reporting the relevant issues and
for working with Adobe to help protect our customers:

o Mark Vincent Yason (@MarkYason) working with Trend Micro Zero Day
Initiative (CVE-2021-28554, CVE-2021-28631, CVE-2021-28632)
o Anonymous working with Trend Micro Zero Day Initiative (CVE-2021-28552)
o qiaoli01 (CVE-2021-28551)

For more information, visit https://helpx.adobe.com/security.html , or email
PSIRT@adobe.com.

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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).
On call after hours for member emergencies only.
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