CVE-2021-39858: Adobe Acrobat Pro DC PostScript File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability
First published: Tue Sep 14 2021(Updated: )
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by an out-of-bounds read vulnerability that could lead to disclosure of arbitrary memory information in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Credit: psirt@adobe.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Adobe Acrobat Dc | >=20.006.20034<=21.005.20060 | |
| Microsoft Windows | ||
| Adobe Acrobat Dc | >=20.006.20034<=21.005.20058 | |
| Apple macOS | ||
| Adobe Acrobat Reader DC | >=20.006.20034<=21.005.20060 | |
| Adobe Acrobat 2017 | >=17.011.30158<=17.011.30199 | |
| Adobe Acrobat Reader 2017 | >=17.011.30158<=17.011.30199 | |
| Adobe Acrobat Reader | >=20.001.30005<=20.004.30006 | |
| Adobe Acrobat Reader | >=20.001.30005<=20.004.30006 |
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Frequently Asked Questions
What is CVE-2021-39858?
CVE-2021-39858 is an out-of-bounds read vulnerability in Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier), and 2017.011.30199 (and earlier) that could lead to disclosure of arbitrary memory information.
How does the vulnerability impact Acrobat Reader DC?
The vulnerability in Acrobat Reader DC could allow an attacker to access arbitrary memory information within the context of the current user.
What is the severity of CVE-2021-39858?
The severity of CVE-2021-39858 is medium, with a CVSS score of 3.3.
How can I fix the CVE-2021-39858 vulnerability?
To fix the CVE-2021-39858 vulnerability, update Acrobat Reader DC to the latest version available.
Where can I find more information about CVE-2021-39858?
You can find more information about CVE-2021-39858 on the Adobe Security Bulletin APSB21-55.
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