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AUSCERT External Security Bulletin Redistribution
ESB-2020.3791
APSB20-67 Security update available for Adobe Acrobat and Reader
4 November 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Adobe Acrobat and Reader for Windows and macOS
Publisher: Adobe
Operating System: Windows
Mac OS
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-24439 CVE-2020-24438 CVE-2020-24437
CVE-2020-24436 CVE-2020-24435 CVE-2020-24434
CVE-2020-24433 CVE-2020-24432 CVE-2020-24431
CVE-2020-24430 CVE-2020-24429 CVE-2020-24428
CVE-2020-24427 CVE-2020-24426
Original Bulletin:
https://helpx.adobe.com/security/products/acrobat/apsb20-67.html
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Updates Available for Adobe Acrobat and Reader | APSB20-67
+-----------------------+-----------------------------------+-----------------+
| Bulletin ID | Date Published | Priority |
+-----------------------+-----------------------------------+-----------------+
|APSB20-67 |November 03, 2020 |2 |
+-----------------------+-----------------------------------+-----------------+
Summary
Adobe has released security updates for Adobe Acrobat and Reader for Windows
andmacOS. These updates address critical , important and moderate
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 |2020.012.20048 and earlier |Windows & |
| | |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
|Acrobat Reader DC|Continuous |2020.012.20048 and earlier |Windows & |
| | |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
+-----------------+-----------+--------------------------------+--------------+
|Acrobat 2020 |Classic |2020.001.30005 and earlier |Windows & |
| |2020 |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
|Acrobat Reader |Classic |2020.001.30005 and earlier |Windows & |
|2020 |2020 |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
+-----------------+-----------+--------------------------------+--------------+
|Acrobat 2017 |Classic |2017.011.30175 and earlier |Windows & |
| |2017 |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
|Acrobat Reader |Classic |2017.011.30175 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 Download the enterprise installers from ftp://ftp.adobe.com/pub/adobe/ , or
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 | |
+-------------+----------+--------------+------------+-----------+------------+
| | | |Windowsand | |Windows |
|Acrobat DC |Continuous|2020.013.20064|macOS |2 | |
| | | | | |macOS |
+-------------+----------+--------------+------------+-----------+------------+
| | | | | |Windows |
|Acrobat |Continuous|2020.013.20064|Windowsand |2 | |
|Reader DC | | |macOS | | |
| | | | | |macOS |
+-------------+----------+--------------+------------+-----------+------------+
+-------------+----------+--------------+------------+-----------+------------+
| |Classic | |Windows and | |Windows |
|Acrobat 2020 |2020 |2020.001.30010|macOS |2 | |
| | | | | |macOS |
+-------------+----------+--------------+------------+-----------+------------+
| | | | | |Windows |
|Acrobat |Classic |2020.001.30010|Windows and |2 | |
|Reader 2020 |2020 | |macOS | | |
| | | | | |macOS |
+-------------+----------+--------------+------------+-----------+------------+
+-------------+----------+--------------+------------+-----------+------------+
| |Classic | |Windowsand | |Windows |
|Acrobat 2017 |2017 |2017.011.30180|macOS |2 | |
| | | | | |macOS |
+-------------+----------+--------------+------------+-----------+------------+
|Acrobat |Classic | |Windowsand | |Windows |
|Reader 2017 |2017 |2017.011.30180|macOS |2 | |
| | | | | |macOS |
+-------------+----------+--------------+------------+-----------+------------+
Vulnerability Details
+-----------------------+------------------------+---------+------------------+
| Vulnerability Category| Vulnerability Impact |Severity | CVE Number |
+-----------------------+------------------------+---------+------------------+
|Heap-based buffer |Arbitrary Code Execution|Critical |CVE-2020-24435 |
|overflow | | | |
+-----------------------+------------------------+---------+------------------+
|Improper access control|Local privilege |Important|CVE-2020-24433 |
| |escalation | | |
+-----------------------+------------------------+---------+------------------+
|Improper input |Arbitrary JavaScript |Important|CVE-2020-24432 |
|validation |Execution | | |
+-----------------------+------------------------+---------+------------------+
|Signature validation |Minimal |Moderate |CVE-2020-24439 |
|bypass |(defense-in-depth fix) | | |
+-----------------------+------------------------+---------+------------------+
|Signature verification |Local privilege |Important|CVE-2020-24429 |
|bypass |escalation | | |
+-----------------------+------------------------+---------+------------------+
|Improper input |Information Disclosure |Important|CVE-2020-24427 |
|validation | | | |
+-----------------------+------------------------+---------+------------------+
|Security feature bypass|Dynamic library |Important|CVE-2020-24431 |
| |injection | | |
+-----------------------+------------------------+---------+------------------+
|Out-of-bounds write |Arbitrary Code Execution|Critical |CVE-2020-24436 |
+-----------------------+------------------------+---------+------------------+
| | | |CVE-2020-24426 |
|Out-of-bounds read |Information Disclosure |Moderate | |
| | | |CVE-2020-24434 |
+-----------------------+------------------------+---------+------------------+
|Race Condition |Local privilege |Important|CVE-2020-24428 |
| |escalation | | |
+-----------------------+------------------------+---------+------------------+
| | | |CVE-2020-24430 |
|Use-after-free |Arbitrary Code Execution|Critical | |
| | | |CVE-2020-24437 |
+-----------------------+------------------------+---------+------------------+
|Use-after-free |Information Disclosure |Moderate |CVE-2020-24438 |
+-----------------------+------------------------+---------+------------------+
Acknowledgements
Adobe would like to thank the following individuals and organizations for
reporting the relevant issues and for working with Adobe to help protect our
customers:
o Kimiya working with Trend Micro Zero Day Initiative (CVE-2020-24434,
CVE-2020-24436)
o Mark Vincent Yason (@MarkYason) working with Trend Micro Zero Day
Initiative (CVE-2020-24426, CVE-2020-24438)
o Yuebin Sun(@yuebinsun) of Tencent Security Xuanwu Lab (CVE-2020-24439)
o Thijs Alkemade from Computest Research Division(CVE-2020-24428,
CVE-2020-24429)
o Lasse Trolle Borup of Danish Cyber Defence (CVE-2020-24433)
o Aleksandar Nikolic of Cisco Talos (CVE-2020-24435, CVE-2020-24437)
o Haboob Labs.( CVE-2020-24427)
o Hou JingYi (@hjy79425575) of Qihoo 360 CERT (CVE-2020-24431)
o Alan Chang Enze of STAR Labs (CVE-2020-24430)
o Simon Rohlmann, Vladislav Mladenov, Christian Mainka and Jorg Schwenk
fromRuhr University Bochum, Chair for Network and Data Security
(CVE-2020-24432)
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