CVE-2021-36153 : Security Advisory and Response

A vulnerability in gRPC Swift 1.1.0 and 1.1.1 can be exploited by remote attackers to trigger denial of service through malformed requests.

Understanding CVE-2021-36153

This CVE involves a mismanaged state in GRPCWebToHTTP2ServerCodec.swift in gRPC Swift versions 1.1.0 and 1.1.1, exposing the possibility of service denial when exploited by attackers.

What is CVE-2021-36153?

The vulnerability in this CVE allows attackers to disrupt services by manipulating requests through the affected gRPC Swift versions.

The Impact of CVE-2021-36153

The impact of this CVE is severe as it can lead to denial of service attacks by exploiting the mismanaged state in the specific component of gRPC Swift.

Technical Details of CVE-2021-36153

This section will cover the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises due to a mismanaged state in GRPCWebToHTTP2ServerCodec.swift, enabling attackers to exploit the flaw by sending malformed requests.

Affected Systems and Versions

The affected systems include any running gRPC Swift 1.1.0 and 1.1.1.

Exploitation Mechanism

Remote attackers can trigger denial of service attacks by leveraging this vulnerability through the manipulation of requests.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-36153, immediate steps and long-term security practices need to be implemented.

Immediate Steps to Take

Users are advised to update to the latest patched version of gRPC Swift to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implementing strict input validation practices and ensuring secure coding practices can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly checking for patches and updates from the official gRPC Swift releases and security advisories is crucial to maintaining a secure environment.