Protect yourself against future threats.
-----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. 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.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=8Hte
-----END PGP SIGNATURE-----