CVE-2021-39865 : What You Need to Know

Adobe FrameMaker versions 2019 Update 8 and 2020 Release Update 2 are impacted by an out-of-bounds read vulnerability leading to memory disclosure. This article provides insights into the issue, impact, technical details, and mitigation methods.

Understanding CVE-2021-39865

Adobe FrameMaker TIF File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

What is CVE-2021-39865?

Adobe FrameMaker versions 2019 Update 8 and 2020 Release Update 2 are susceptible to an out-of-bounds read vulnerability. Exploitation could allow an attacker to expose sensitive memory, potentially bypassing mitigations like ASLR, requiring user interaction through opening a malicious file.

The Impact of CVE-2021-39865

The vulnerability has a CVSS v3.0 base score of 3.3 (Low severity) with specifics such as:

Attack Complexity: Low
Attack Vector: Local
Confidentiality Impact: Low
Integrity Impact: None
User Interaction: Required

Technical Details of CVE-2021-39865

Vulnerability Description

The vulnerability pertains to an out-of-bounds read (CWE-125) issue within Adobe FrameMaker, allowing disclosure of sensitive memory upon exploitation.

Affected Systems and Versions

Adobe FrameMaker
Versions Affected:
FrameMaker 2020.2 and earlier
FrameMaker 2019.8 and earlier
Custom versions

Exploitation Mechanism

Exploiting this vulnerability involves an attacker coercing a victim to open a specifically crafted malicious file, leading to memory exposure.

Mitigation and Prevention

Immediate Steps to Take

Implement security patches provided by Adobe immediately.
Exercise caution while opening files from unknown or untrusted sources.
Educate users about the risks associated with opening unfamiliar files.

Long-Term Security Practices

Regularly update Adobe FrameMaker to mitigate security vulnerabilities.
Conduct security training to enhance user awareness about potential threats.

Patching and Updates

Apply the latest security updates and patches released by Adobe to safeguard systems against exploits related to CVE-2021-39865.