CVE-2021-43759 : Exploit Details and Defense Strategies

CVE-2021-43759 is a vulnerability affecting Adobe Media Encoder versions 22.0, 15.4.2, and earlier, leading to an out-of-bounds read that could disclose sensitive memory. This could allow an attacker to bypass certain mitigations and exploit the victim through a malicious MP4 file.

Understanding CVE-2021-43759

Adobe Media Encoder is vulnerable to an out-of-bounds read issue that can potentially disclose sensitive memory, posing a risk to user data security.

What is CVE-2021-43759?

CVE-2021-43759 is a vulnerability in Adobe Media Encoder that enables attackers to read sensitive memory out of bounds, consequently allowing them to potentially access and exploit confidential information.

The Impact of CVE-2021-43759

The vulnerability poses a low severity risk, with a CVSS base score of 3.3. Exploitation of this issue requires user interaction through opening a malicious MP4 file, potentially leading to information disclosure.

Technical Details of CVE-2021-43759

The technical details shed light on the specifics of the vulnerability in Adobe Media Encoder.

Vulnerability Description

Adobe Media Encoder versions 22.0, 15.4.2, and earlier are prone to an out-of-bounds read flaw, allowing attackers to access sensitive memory beyond the intended boundaries.

Affected Systems and Versions

Product: Media Encoder
Vendor: Adobe
Versions Affected: 22.0, 15.4.2, and earlier

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Local
User Interaction: Required
Integrity Impact: None
Confidentiality Impact: Low
Exploit Code Maturity: Not Defined
Vector String: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Mitigation and Prevention

Implementing immediate steps and long-term security practices can help prevent and mitigate the risks associated with CVE-2021-43759.

Immediate Steps to Take

Update Adobe Media Encoder to the latest version that contains a patch for the vulnerability.
Avoid opening untrusted or suspicious MP4 files to mitigate potential exploitation.

Long-Term Security Practices

Regularly update software and applications to ensure protection against known vulnerabilities.
Educate users about the risks of opening files from untrusted sources to enhance overall security.

Patching and Updates

Visit Adobe's security advisory page for detailed instructions on how to patch and update Adobe Media Encoder to address CVE-2021-43759.