CVE-2021-40763 : Security Advisory and Response

Adobe Character Animator version 4.4 is affected by a memory corruption vulnerability with a possibility of arbitrary code execution. This article provides details on the vulnerability and its impact, along with mitigation strategies.

Understanding CVE-2021-40763

Adobe Character Animator has a vulnerability that could lead to arbitrary code execution, impacting the confidentiality, integrity, and availability of the affected systems.

What is CVE-2021-40763?

This CVE refers to a memory corruption vulnerability present in Adobe Character Animator version 4.4 and earlier when handling a WAF file. Successful exploitation requires user interaction.

The Impact of CVE-2021-40763

The CVSS v3.1 base score for this vulnerability is 7.8 (High), with significant impacts on confidentiality, integrity, and availability of the system. The attack complexity is low, but user interaction is required, making it a critical issue.

Technical Details of CVE-2021-40763

Adobe Character Animator's vulnerability involves memory corruption that can be exploited for arbitrary code execution, emphasizing the importance of applying mitigations promptly.

Vulnerability Description

The vulnerability in version 4.4 allows an attacker to execute arbitrary code within the user's context by manipulating a WAF file, posing a severe security risk.

Affected Systems and Versions

Product: Character Animator (Preview 4)
Vendor: Adobe
Affected Versions:
Character Animator 4.4 and earlier
Custom versions with unspecified version numbers

Exploitation Mechanism

Attackers can exploit this vulnerability by tricking a user into loading a malicious WAF file, triggering the memory corruption that leads to arbitrary code execution.

Mitigation and Prevention

Taking immediate action to mitigate the impact of CVE-2021-40763 is crucial to safeguard systems.

Immediate Steps to Take

Update Adobe Character Animator to the latest version.
Avoid opening WAF files from untrusted sources.
Educate users about the risks associated with opening unknown files.

Long-Term Security Practices

Implement strong user access controls.
Regularly educate users on cybersecurity best practices to prevent social engineering attacks.

Patching and Updates

Adobe has likely released patches addressing this vulnerability. Ensure systems are updated with the latest security patches to mitigate the risk of exploitation.