CVE-2021-39852 : Vulnerability Insights and Analysis
Learn about CVE-2021-39852, a vulnerability in Adobe Acrobat Reader DC versions allowing denial-of-service attacks. Find mitigation steps and impacted versions.
Adobe Acrobat Reader DC versions 2021.005.20060 and earlier, 2020.004.30006 and earlier, and 2017.011.30199 and earlier are affected by a Null pointer dereference vulnerability. Exploiting this issue could lead to application denial-of-service.
Understanding CVE-2021-39852
Adobe Acrobat Reader DC experienced a Null pointer dereference vulnerability that could result in an application denial-of-service.
What is CVE-2021-39852?
The vulnerability allows an unauthenticated attacker to cause a denial-of-service by leveraging a Null pointer dereference in Acrobat Reader DC versions.
The Impact of CVE-2021-39852
- CVSS Base Score: 5.5 (Medium)
- Attack Vector: Local
- User Interaction: Required
- Availability Impact: High
Technical Details of CVE-2021-39852
Adobe Acrobat Reader DC's vulnerability detailed.
Vulnerability Description
The vulnerability is a Null pointer dereference, allowing an unauthenticated attacker to exploit and cause a denial-of-service.
Affected Systems and Versions
- Affected Products: Adobe Acrobat Reader
- Vendor: Adobe
- Affected Versions:
- Acrobat Reader DC 2021 July and earlier
- 20.0-Classic 2021 July and earlier
- 17.0-Classic 2021 July and earlier
Exploitation Mechanism
Exploitation requires user interaction, where a victim must open a malicious file triggering the vulnerability.
Mitigation and Prevention
Steps to mitigate and prevent exploits.
Immediate Steps to Take
- Update Acrobat Reader to the latest version.
- Be cautious while opening files from untrusted sources.
Long-Term Security Practices
- Regularly update software to patch vulnerabilities.
- Educate users on safe browsing practices.
Patching and Updates
Upgrading to the latest version of Acrobat reader is crucial to prevent exploitation of this vulnerability.