CVE-2021-43758 : Security Advisory and Response

Adobe Media Encoder versions are affected by an out-of-bounds read vulnerability impacting users' memory safety.

Understanding CVE-2021-43758

Adobe Media Encoder versions 22.0, 15.4.2 (and earlier) are vulnerable to an out-of-bounds read vulnerability leading to memory disclosure. This issue could potentially allow an attacker to bypass certain security measures like ASLR, requiring user interaction via a malicious MP4 file.

What is CVE-2021-43758?

CVE-2021-43758 affects Adobe Media Encoder versions, potentially exposing sensitive memory information to attackers.
The vulnerability involves parsing MP4 files, and exploitation requires a victim to interact with a malicious file.

The Impact of CVE-2021-43758

CVSS Score: 3.3 (Low Severity)
Attack Vector: Local
Exploitability: Requires user interaction
Confidentiality Impact: Low
Integrity Impact: None
Availability Impact: None

Technical Details of CVE-2021-43758

Adobe Media Encoder's vulnerability details and the systems impacted.

Vulnerability Description

The flaw allows an attacker to read sensitive memory out-of-bounds, potentially leading to data exposure.

Affected Systems and Versions

Product: Media Encoder
Vendor: Adobe
Versions affected: 22.0, 15.4.2, and earlier
Version Type: Semantic Versioning (semver)
Affected by an out-of-bounds read vulnerability

Exploitation Mechanism

To exploit, an attacker needs a victim to open a crafted MP4 file
Leveraging this vulnerability might enable attackers to surpass certain security measures like ASLR

Mitigation and Prevention

Protective steps to mitigate the CVE-2021-43758 vulnerability.

Immediate Steps to Take

Update Adobe Media Encoder to the latest patch
Avoid opening MP4 files from unknown or untrusted sources

Long-Term Security Practices

Regularly update software and apply security patches promptly
Conduct security training to raise awareness about potential threats

Patching and Updates

Ensure timely installation of security updates to Adobe Media Encoder