CVE-2021-43610 : What You Need to Know

Belledonne Belle-sip before 5.0.20 can crash applications such as Linphone via an invalid From header in an unauthenticated SIP message.

Understanding CVE-2021-43610

Belledonne Belle-sip before version 5.0.20 is vulnerable to a specific issue that can lead to application crashes.

What is CVE-2021-43610?

This CVE refers to a vulnerability in Belle-sip where an unauthenticated SIP message with an invalid From header can cause applications like Linphone to crash.

The Impact of CVE-2021-43610

The vulnerability can be exploited to crash applications utilizing Belle-sip, potentially leading to service disruption and denial of service.

Technical Details of CVE-2021-43610

Belledonne Belle-sip vulnerability specifics and affected systems.

Vulnerability Description

The issue arises from an invalid From header in unauthenticated SIP messages, impacting the stability of applications like Linphone.

Affected Systems and Versions

Belle-sip versions before 5.0.20

Exploitation Mechanism

Attackers can send unauthenticated SIP messages with a specific header to trigger application crashes.

Mitigation and Prevention

Measures to mitigate and prevent exploitation of CVE-2021-43610.

Immediate Steps to Take

Update Belle-sip to version 5.0.20 or above to address the vulnerability.
Monitor network traffic for any suspicious activity targeting SIP communications.

Long-Term Security Practices

Regularly update SIP software to patch vulnerabilities.

Patching and Updates

Apply security patches promptly to safeguard against known vulnerabilities.