CVE-2021-41193 : Security Advisory and Response

A detailed overview of the CVE-2021-41193 vulnerability affecting wire-avs component of Wire.

Understanding CVE-2021-41193

This section provides insights into the nature and impact of the vulnerability.

What is CVE-2021-41193?

CVE-2021-41193 is a remote format string vulnerability in wire-avs, the audio visual signaling (AVS) component of Wire, an open-source messenger. It allows an attacker to trigger denial of service or potential execution of arbitrary code.

The Impact of CVE-2021-41193

The vulnerability scored a CVSS base score of 9.8, indicating a critical severity level. It poses a high risk to confidentiality, integrity, and availability of affected systems.

Technical Details of CVE-2021-41193

Exploring the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in wire-avs versions prior to 7.1.12 enables attackers to exploit a remote format string issue, potentially leading to denial of service or arbitrary code execution.

Affected Systems and Versions

Product: wire-avs
Vendor: wireapp
Versions Affected: < 7.1.12

Exploitation Mechanism

The vulnerability can be exploited remotely with low attack complexity, requiring no user interaction. Attackers can trigger high impact on confidentiality, integrity, and availability.

Mitigation and Prevention

Recommendations to mitigate and prevent exploitation of CVE-2021-41193.

Immediate Steps to Take

Update wire-avs to version 7.1.12 or later to patch the vulnerability.
Monitor for any unusual activities on the system.

Long-Term Security Practices

Implement strict input validation mechanisms to prevent format string vulnerabilities.
Conduct regular security audits and penetration testing to identify and address potential vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates to eliminate known vulnerabilities.