pjsip — Vulnerabilities & Security Advisories 48

PJSIP is an open-source multimedia communication library primarily utilized for developing Voice over IP (VoIP) applications, including softphones and SIP servers. Its widespread adoption in embedded systems and enterprise telephony solutions has resulted in a significant attack surface, evidenced by thirty-seven recorded Common Vulnerabilities and Exposures. Historically, the codebase has been susceptible to critical flaws such as remote code execution, buffer overflows, and denial-of-service conditions, often stemming from inadequate input validation and memory management errors. While not inherently insecure, its complexity and frequent updates have led to periodic security incidents where attackers exploited parsing vulnerabilities to gain unauthorized access or disrupt services. Developers are advised to prioritize regular patching and rigorous code auditing to mitigate these risks, ensuring the integrity of communication infrastructure that relies on this foundational library for real-time audio and video transmission.