CVE-2020-6820 : What You Need to Know

A use-after-free vulnerability in Mozilla products could be exploited under specific conditions, potentially leading to targeted attacks.

Understanding CVE-2020-6820

This CVE involves a race condition triggering a use-after-free scenario when handling a ReadableStream in Mozilla products.

What is CVE-2020-6820?

Under certain conditions, a race condition in handling a ReadableStream can result in a use-after-free vulnerability, which has been observed in targeted attacks.

The Impact of CVE-2020-6820

The vulnerability affects Thunderbird versions less than 68.7.0, Firefox versions less than 74.0.1, and Firefox ESR versions less than 68.6.1.

Technical Details of CVE-2020-6820

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

A race condition in handling a ReadableStream can lead to a use-after-free vulnerability in Mozilla products.

Affected Systems and Versions

Thunderbird < 68.7.0
Firefox < 74.0.1
Firefox ESR < 68.6.1

Exploitation Mechanism

The vulnerability can be exploited through targeted attacks abusing the race condition in ReadableStream handling.

Mitigation and Prevention

Protecting systems from CVE-2020-6820 requires immediate actions and long-term security measures.

Immediate Steps to Take

Update affected Mozilla products to versions that address the vulnerability.
Monitor for any unusual activities that could indicate exploitation.

Long-Term Security Practices

Implement secure coding practices to prevent similar vulnerabilities.
Regularly update and patch software to mitigate potential risks.

Patching and Updates

Apply patches provided by Mozilla to fix the vulnerability and enhance system security.