Use-after-free in Adobe Reader and Adobe Acrobat - CVE-2021-40730
Published: October 12, 2021 / Updated: October 14, 2021
Vulnerability identifier: #VU57299
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-40730
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to a use-after-free error when processing JPG2000 images inside a PDF files. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger a use-after-free error and read contents of memory on the system.
Affected software
Adobe Reader
Adobe Acrobat
Adobe Acrobat
How to mitigate CVE-2021-40730
Install updates from vendor's website.
Adobe Reader - addressed in versions 17.011.30204, 20.004.30017, 21.007.20099
Adobe Acrobat - addressed in versions 21.007.20099, 17.011.30204, 20.004.30017
Adobe Acrobat - addressed in versions 21.007.20099, 17.011.30204, 20.004.30017