CVE-2021-39859: Use After Free
First published: Wed Sep 06 2023(Updated: )
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 that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to bypass mitigations such as ASLR. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Credit: psirt@adobe.com psirt@adobe.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Adobe Acrobat Dc | >=15.007.20033<=21.005.20060 | |
| Adobe Acrobat Reader DC | >=15.007.20033<=21.005.20060 | |
| Microsoft Windows | ||
| Adobe Acrobat Dc | >=15.007.20033<=21.005.20058 | |
| Adobe Acrobat Reader DC | >=15.007.20033<=21.005.20058 | |
| Apple macOS | ||
| Adobe Acrobat Reader | >=17.011.30180<17.011.30202 | |
| Adobe Acrobat Reader | >=20.001.30005<20.004.30015 | |
| Adobe Acrobat Reader | >=17.011.30180<17.011.30202 | |
| Adobe Acrobat Reader | >=20.001.30005<20.004.30015 |
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Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2021-39859.
What software versions are affected by this vulnerability?
Acrobat Reader DC versions 2021.005.20060 (and earlier), 2020.004.30006 (and earlier) and 2017.011.30199 (and earlier) are affected by this vulnerability.
What is the severity of CVE-2021-39859?
The severity of CVE-2021-39859 is medium with a severity value of 5.5.
How can an attacker exploit this vulnerability?
An attacker can leverage this vulnerability to bypass mitigations such as ASLR and potentially disclose sensitive memory.
Where can I find more information about this vulnerability?
You can find more information about this vulnerability at the following link: https://helpx.adobe.com/security/products/acrobat/apsb21-55.html
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- agent/description
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- agent/first-publish-date
- agent/softwarecombine
- agent/tags
- collector/nvd-api
- agent/software-canonical-lookup-request
- collector/nvd-index
- vendor/adobe
- canonical/adobe acrobat dc
- version/adobe acrobat dc/15.007.20033
- version/adobe acrobat dc/21.005.20060
- canonical/adobe acrobat reader dc
- version/adobe acrobat reader dc/15.007.20033
- version/adobe acrobat reader dc/21.005.20060
- vendor/microsoft
- canonical/microsoft windows
- version/adobe acrobat dc/21.005.20058
- version/adobe acrobat reader dc/21.005.20058
- vendor/apple
- canonical/apple macos
- canonical/adobe acrobat reader
- version/adobe acrobat reader/17.011.30180
- version/adobe acrobat reader/20.001.30005