CVE-2020-11876 Explained : Impact and Mitigation

Zoom Client for Meetings 4.6.11 utilizes a weak SHA-256 hash for OpenSSL EVP AES-256 CBC context initialization.

Understanding CVE-2020-11876

This CVE involves a disputed vulnerability in the Zoom Client for Meetings 4.6.11.

What is CVE-2020-11876?

The vulnerability in airhost.exe uses a weak SHA-256 hash for OpenSSL EVP AES-256 CBC context initialization.
The vendor claims this initialization only occurs within unreachable code.

The Impact of CVE-2020-11876

The use of a weak hash algorithm could potentially lead to cryptographic weaknesses and security vulnerabilities.

Technical Details of CVE-2020-11876

This section provides technical insights into the vulnerability.

Vulnerability Description

Zoom Client for Meetings 4.6.11 uses the SHA-256 hash of 0123425234234fsdfsdr3242 for OpenSSL EVP AES-256 CBC context initialization.

Affected Systems and Versions

Product: Zoom Client for Meetings
Version: 4.6.11

Exploitation Mechanism

The vulnerability lies in the improper use of a weak hash algorithm during initialization.

Mitigation and Prevention

Protecting systems from the CVE and preventing potential exploitation is crucial.

Immediate Steps to Take

Update Zoom Client for Meetings to the latest version.
Monitor vendor communications for security patches.

Long-Term Security Practices

Implement strong cryptographic practices in software development.
Regularly review and update cryptographic algorithms.

Patching and Updates

Apply security patches promptly to address known vulnerabilities.