Bulletin ID
Last updated on
Security update for Adobe Acrobat and Reader | APSB21-104
|
|
Date Published |
Priority |
|---|---|---|
|
APSB21-104 |
October 12, 2021 |
2 |
Summary
Affected Versions
|
Track |
Affected Versions |
Platform |
|
|
Acrobat DC |
Continuous |
21.007.20095 and earlier versions |
Windows |
|
Acrobat Reader DC |
Continuous |
21.007.20095 and earlier versions |
Windows |
|
Acrobat DC |
Continuous |
21.007.20096 and earlier versions |
macOS |
|
Acrobat Reader DC |
Continuous |
21.007.20096 and earlier versions |
macOS |
|
|
|
|
|
|
Acrobat 2020 |
Classic 2020 |
20.004.30015 and earlier versions |
Windows & macOS |
|
Acrobat Reader 2020 |
Classic 2020 |
20.004.30015 and earlier versions |
Windows & macOS |
|
|
|
|
|
|
Acrobat 2017 |
Classic 2017 |
17.011.30202 and earlier versions |
Windows & macOS |
|
Acrobat Reader 2017 |
Classic 2017 |
17.011.30202 and earlier versions |
Windows & macOS |
For questions regarding Acrobat DC, please visit the Acrobat DC FAQ page.
For questions regarding Acrobat Reader DC, please visit the Acrobat Reader DC FAQ page.
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:
Users can update their product installations manually by choosing Help > Check for Updates.
The products will update automatically, without requiring user intervention, when updates are detected.
The full Acrobat Reader installer can be downloaded from the Acrobat Reader Download Center.
For IT administrators (managed environments):
Refer to the specific release note version for links to installers.
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:
|
Track |
Updated Versions |
Platform |
Priority Rating |
Availability |
|
|
Acrobat DC |
Continuous |
21.007.20099 |
Windows and macOS |
2 |
|
|
Acrobat Reader DC |
Continuous |
21.007.20099 |
Windows and macOS |
2 |
|
|
|
|
|
|
|
|
|
Acrobat 2020 |
Classic 2020 |
20.004.30017 |
Windows and macOS |
2 |
|
|
Acrobat Reader 2020 |
Classic 2020 |
20.004.30017 |
Windows and macOS |
2 |
|
|
|
|
|
|
|
|
|
Acrobat 2017 |
Classic 2017 |
17.011.30204 |
Windows and macOS |
2 |
|
|
Acrobat Reader 2017 |
Classic 2017 |
17.011.30204 |
Windows and macOS |
2 |
Vulnerability Details
| Vulnerability Category | Vulnerability Impact | Severity | CVSS base score |
CVSS vector |
CVE Number |
|---|---|---|---|---|---|
Use After Free (CWE-416)
|
Arbitrary code execution
|
Critical
|
7.8
|
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
|
CVE-2021-40728
|
Out-of-bounds Read (CWE-125)
|
Privilege escalation
|
Moderate
|
3.3
|
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
|
CVE-2021-40729
|
| Use After Free (CWE-416) |
Privilege escalation |
Moderate | 3.3 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |
CVE-2021-40730 |
| Out-of-bounds Write (CWE-787) |
Arbitrary code execution |
Critical |
7.8 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
CVE-2021-40731 |
Acknowledgements
Adobe would like to thank the following for reporting these issues and for working with Adobe to help protect our customers:
- Habooblabs (CVE-2021-40728, CVE-2021-40729)
- Kai Lu of Zscaler's ThreatLabz (CVE-2021-40729)
- Anonymous working with Trend Micro Zero Day Initiative (CVE-2021-40730, CVE-2021-40731)
Revisions
October 13th: Updated acknowledgements for CVE-2021-40729
For more information, visit https://helpx.adobe.com/security.html, or email PSIRT@adobe.com.