medium
6.6
CWE
476
Advisory Published
Updated

CVE-2021-21057: Acrobat Reader DC Invalid Memory Read Due To An Uninitialized Pointer

First published: Tue Feb 09 2021(Updated: )

Acrobat Reader DC versions versions 2020.013.20074 (and earlier), 2020.001.30018 (and earlier) and 2017.011.30188 (and earlier) are affected by a null pointer dereference vulnerability when parsing a specially crafted PDF file. An unauthenticated attacker could leverage this vulnerability to achieve denial of service 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 SoftwareAffected VersionHow to fix
Adobe Acrobat Reader>=17.0<=17.011.30188
Adobe Acrobat Reader>=20.0<=20.001.30018
Adobe Acrobat Reader DC<=20.013.20074
Adobe Acrobat Reader Notification Manager>=17.0<=17.011.30188
Adobe Acrobat Reader Notification Manager>=20.0<=20.001.300183
Adobe Acrobat Reader<=20.013.20074
macOS
Microsoft Windows Operating System

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2021-21057?

    CVE-2021-21057 has a severity rating of critical as it allows an unauthenticated attacker to exploit a null pointer dereference vulnerability.

  • How do I fix CVE-2021-21057?

    To fix CVE-2021-21057, users should update Adobe Acrobat Reader DC and Acrobat to the latest versions released by Adobe.

  • Which versions of Adobe software are vulnerable to CVE-2021-21057?

    Adobe Acrobat Reader DC versions up to 20.013.20074, and older versions of Acrobat and Acrobat Reader are affected by CVE-2021-21057.

  • What type of vulnerability is CVE-2021-21057?

    CVE-2021-21057 is classified as a null pointer dereference vulnerability that can be exploited when parsing specially crafted PDF files.

  • Is CVE-2021-21057 specific to any operating system?

    CVE-2021-21057 is related to Adobe software and is not specific to any particular operating system, as it affects multiple platforms.

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