Acrobat
CVE-2021-39838
HIGH
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from Vendor (adobe) · only source for this CVE.
CVSS VectorVendor: adobe
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
1DescriptionCVE.org
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability in the processing of the AcroForm buttonGetCaption action that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
AnalysisAI
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability in the processing of the AcroForm. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by a use-after-free vulnerability in the processing of the AcroForm buttonGetCaption action that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file. Affected products include: Adobe Acrobat, Adobe Acrobat Reader, Adobe Acrobat Dc, Adobe Acrobat Reader Dc.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.
Buffer overflow in Adobe Reader and Acrobat 9.x before 9.5.5, 10.x before 10.1.7, and 11.x before 11.0.03 allows attacke
Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows and OS X allow attackers to bypass inten
Multiple heap-based buffer overflows in Adobe Reader and Acrobat 10.x before 10.1.14 and 11.x before 11.0.11 on Windows
Buffer overflow in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11.0.04 on Windows and Mac OS X allows attacke
Buffer overflow in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11.0.04 on Windows and Mac OS X allows attacke
Adobe Reader and Acrobat before 11.0.17, Acrobat and Acrobat Reader DC Classic before 15.006.30198, and Acrobat and Acro
Multiple stack-based buffer overflows in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11.0.04 on Windows and M
Adobe Reader and Acrobat 10.x before 10.1.16 and 11.x before 11.0.13, Acrobat and Acrobat Reader DC Classic before 2015.
Integer overflow in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11.0.04 on Windows and Mac OS X allows attack
Integer overflow in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11.0.04 on Windows and Mac OS X allows attack
Heap-based buffer overflow in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS X a
Integer overflow in Adobe Reader and Acrobat 9.x before 9.5.1 and 10.x before 10.1.3 allows attackers to execute arbitra
Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
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External POC / Exploit Code
Leaving vuln.today