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AUSCERT External Security Bulletin Redistribution
ESB-2021.0443
APSB21-09 Security update available for Adobe Acrobat and Reader
10 February 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Adobe Acrobat DC
Adobe Acrobat Reader DC
Adobe Acrobat 2020
Adobe Acrobat Reader 2020
Adobe Acrobat 2017
Adobe Acrobat Reader 2017
Publisher: Adobe
Operating System: Windows
Mac OS
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Remote with User Interaction
Denial of Service -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-21063 CVE-2021-21062 CVE-2021-21061
CVE-2021-21060 CVE-2021-21059 CVE-2021-21058
CVE-2021-21057 CVE-2021-21046 CVE-2021-21045
CVE-2021-21044 CVE-2021-21042 CVE-2021-21041
CVE-2021-21040 CVE-2021-21039 CVE-2021-21038
CVE-2021-21037 CVE-2021-21036 CVE-2021-21035
CVE-2021-21034 CVE-2021-21033 CVE-2021-21028
CVE-2021-21021 CVE-2021-21017
Original Bulletin:
https://helpx.adobe.com/security/products/acrobat/apsb21-09.html
- --------------------------BEGIN INCLUDED TEXT--------------------
Security update available for Adobe Acrobat and Reader | APSB21-09
+-----------------------+-----------------------------------+-----------------+
| Bulletin ID | Date Published | Priority |
+-----------------------+-----------------------------------+-----------------+
|APSB21-09 |February 09, 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-2021-21017 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 |2020.013.20074 and earlier |Windows & |
| | |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
|Acrobat Reader DC|Continuous |2020.013.20074 and earlier |Windows & |
| | |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
+-----------------+-----------+--------------------------------+--------------+
|Acrobat 2020 |Classic |2020.001.30018 and earlier |Windows & |
| |2020 |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
|Acrobat Reader |Classic |2020.001.30018 and earlier |Windows & |
|2020 |2020 |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
+-----------------+-----------+--------------------------------+--------------+
|Acrobat 2017 |Classic |2017.011.30188 and earlier |Windows & |
| |2017 |versions |macOS |
+-----------------+-----------+--------------------------------+--------------+
|Acrobat Reader |Classic |2017.011.30188 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 Versions | Platform | Priority |Availability|
| | | | | Rating | |
+------------+----------+-----------------+-----------+----------+------------+
|Acrobat DC |Continuous|2021.001.20135 |Windows and|1 |Release |
| | | |macOS | |Notes |
+------------+----------+-----------------+-----------+----------+------------+
|Acrobat |Continuous|2021.001.20135 |Windows and|1 |Release |
|Reader DC | | |macOS | |Notes |
+------------+----------+-----------------+-----------+----------+------------+
+------------+----------+-----------------+-----------+----------+------------+
|Acrobat 2020|Classic |2020.001.30020 |Windows and|1 |Release |
| |2020 | |macOS | |Notes |
+------------+----------+-----------------+-----------+----------+------------+
|Acrobat |Classic |2020.001.30020 |Windows and|1 |Release |
|Reader 2020 |2020 | |macOS | |Notes |
+------------+----------+-----------------+-----------+----------+------------+
+------------+----------+-----------------+-----------+----------+------------+
|Acrobat 2017|Classic |2017.011.30190 |Windows and|1 |Release |
| |2017 | |macOS | |Notes |
+------------+----------+-----------------+-----------+----------+------------+
|Acrobat |Classic |2017.011.30190 |Windows and|1 |Release |
|Reader 2017 |2017 | |macOS | |Notes |
+------------+----------+-----------------+-----------+----------+------------+
Vulnerability Details
+----------------------+------------------------+---------+-------------------+
| Vulnerability | Vulnerability Impact |Severity | CVE Number |
| Category | | | |
+----------------------+------------------------+---------+-------------------+
|Buffer overflow |Application |Important|CVE-2021-21046 |
| |denial-of-service | | |
+----------------------+------------------------+---------+-------------------+
|Heap-based Buffer |Arbitrary code execution|Critical |CVE-2021-21017 |
|Overflow | | | |
+----------------------+------------------------+---------+-------------------+
|Path Traversal |Arbitrary code execution|Critical |CVE-2021-21037 |
+----------------------+------------------------+---------+-------------------+
|Integer Overflow |Arbitrary code execution|Critical |CVE-2021-21036 |
+----------------------+------------------------+---------+-------------------+
|Improper Access |Privilege escalation |Critical |CVE-2021-21045 |
|Control | | | |
+----------------------+------------------------+---------+-------------------+
| | | |CVE-2021-21042 |
|Out-of-bounds Read |Privilege escalation |Important| |
| | | |CVE-2021-21034 |
+----------------------+------------------------+---------+-------------------+
|Use-after-free |Information Disclosure |Important|CVE-2021-21061 |
+----------------------+------------------------+---------+-------------------+
| | | |CVE-2021-21044 |
|Out-of-bounds Write |Arbitrary code execution|Critical | |
| | | |CVE-2021-21038 |
+----------------------+------------------------+---------+-------------------+
| | | |CVE-2021-21058 |
| | | | |
| | | |CVE-2021-21059 |
|Buffer overflow |Arbitrary code execution|Critical | |
| | | |CVE-2021-21062 |
| | | | |
| | | |CVE-2021-21063 |
+----------------------+------------------------+---------+-------------------+
|NULL Pointer |Information Disclosure |Important|CVE-2021-21057 |
|Dereference | | | |
+----------------------+------------------------+---------+-------------------+
|Improper Input |Information Disclosure |Important|CVE-2021-21060 |
|Validation | | | |
+----------------------+------------------------+---------+-------------------+
| | | |CVE-2021-21041 |
| | | | |
| | | |CVE-2021-21040 |
| | | | |
| | | |CVE-2021-21039 |
| | | | |
|Use After Free |Arbitrary code execution|Critical |CVE-2021-21035 |
| | | | |
| | | |CVE-2021-21033 |
| | | | |
| | | |CVE-2021-21028 |
| | | | |
| | | |CVE-2021-21021 |
+----------------------+------------------------+---------+-------------------+
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-2021-21017)
o Nipun Gupta, Ashfaq Ansari, and Krishnakant Patil - CloudFuzz
(CVE-2021-21041)
o Mark Vincent Yason (@MarkYason) working with Trend Micro Zero Day
Initiative (CVE-2021-21042, CVE-2021-21034)
o Fenghan_zuijinyoukongma_woxiangyueniyiqichifankandianying working with
Trend Micro Zero Day Initiative (CVE-2021-21035, CVE-2021-21033,
CVE-2021-21028, CVE-2021-21021)
o AIOFuzzer working with Trend Micro Zero Day Initiative (CVE-2021-21044,
CVE-2021-21061)
o 360CDSRC in Tianfu Cup 2020 International Cybersecurity Contest
(CVE-2021-21037)
o Will Dormann of CERT/CC (CVE-2021-21045)
o Xuwei Liu (shellway) (CVE-2021-21046)
o in Tianfu Cup 2020 International Cybersecurity Contest (CVE-2021-21040)
o 360 in Tianfu Cup 2020 International Cybersecurity
Contest (CVE-2021-21039)
o in Tianfu Cup 2020 International
Cybersecurity Contest (CVE-2021-21038)
o CodeMaster in Tianfu Cup 2020 International Cybersecurity Contest
(CVE-2021-21036)
o Xinyu Wan (wxyxsx) (CVE-2021-21057)
o Haboob Labs (CVE-2021-21060)
o Zhibin Zhang (zzbthechaos) (CVE-2021-21058, CVE-2021-21059, CVE-2021-21062,
CVE-2021-21063)
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