CVE-2021-29508 : Security Advisory and Response

Insecure deserialization in Wire

Understanding CVE-2021-29508

A vulnerability in how Wire handles type information in its serialization format.

What is CVE-2021-29508?

Due to a flaw in Wire, attackers can pass malicious payloads to a deserializer, potentially allowing the creation of any type on the deserializing end.

The Impact of CVE-2021-29508

With a high severity rating, this critical vulnerability can lead to integrity impact and high availability impact in affected systems.

Technical Details of CVE-2021-29508

Details regarding the vulnerability, affected systems, and exploitation mechanism.

Vulnerability Description

The flaw allows attackers to manipulate type information, posing a risk of executing arbitrary code during deserialization.

Affected Systems and Versions

Wire version <= 1.0.0 is affected by this vulnerability.

Exploitation Mechanism

Through leveraging how type information is handled in Wire's serialization format, malicious payloads can be passed to a deserializer.

Mitigation and Prevention

Recommendations to address the CVE-2021-29508 vulnerability.

Immediate Steps to Take

Users are advised to update Wire to a secure version (> 1.0.0) and review deserialization practices in their applications.

Long-Term Security Practices

Adopt secure coding practices related to deserialization to prevent similar vulnerabilities in the future.

Patching and Updates

Stay informed on security updates for Wire and promptly apply patches to secure your systems.