CVE-2023-29535 : What You Need to Know

A weak map access issue after Garbage Collector compaction led to memory corruption and a potentially exploitable crash in Mozilla products.

Understanding CVE-2023-29535

This vulnerability affects Firefox, Focus for Android, Firefox ESR, Firefox for Android, and Thunderbird.

What is CVE-2023-29535?

Following Garbage Collector compaction, weak maps were accessed prematurely, causing memory corruption and potential crashes.

The Impact of CVE-2023-29535

The vulnerability could lead to memory corruption and a crash, potentially exploitable for malicious purposes.

Technical Details of CVE-2023-29535

Weak maps accessed incorrectly post Garbage Collector compaction, resulting in memory corruption.

Vulnerability Description

Accessing weak maps prematurely caused memory corruption and potential crashes.

Affected Systems and Versions

Firefox < 112
Focus for Android < 112
Firefox ESR < 102.10
Firefox for Android < 112
Thunderbird < 102.10

Exploitation Mechanism

Weak map access after Garbage Collector compaction led to memory corruption and potentially exploitable crashes.

Mitigation and Prevention

Take immediate steps to address the vulnerability in Mozilla products.

Immediate Steps to Take

Update affected products to versions that contain the necessary security patches.

Long-Term Security Practices

Employ ongoing security monitoring and software updates to mitigate risks.

Patching and Updates

Regularly check for and apply security updates provided by Mozilla to prevent exploitation of vulnerabilities.