CVSS 3.1 Score 5.9 of 10 (medium)


Published Dec 27, 2023
Updated: Feb 2, 2024
CWE ID 703


CVE-2023-51443 is a vulnerability affecting FreeSWITCH, a Software Defined Telecom Stack used for digital transformation in telecom switches. Prior to version 1.10.11, FreeSWITCH is susceptible to a Denial of Service attack due to a race condition in the hello handshake phase of the DTLS protocol. This vulnerability can be exploited by sending an invalid CipherSuite message to the FreeSWITCH server, resulting in the tearing down of media sessions and signaling levels, thus denying new encrypted calls. To remediate this vulnerability, it is recommended to upgrade FreeSWITCH to a version beyond 1.10.11. The potential danger posed by this vulnerability is a massive Denial of Service on vulnerable FreeSWITCH servers, impacting calls that rely on DTLS-SRTP encryption.

Explore Beyond the CVE Basics with Recorded Future's Vulnerability Intelligence

Note: This is just a basic overview providing quick insights into CVE-2023-51443 information. Gain full access to comprehensive CVE data, risk scores, prioritization, and mitigation data through Recorded Future's Vulnerability Intelligence:
  • Prioritize with Risk-Based Scoring
  • Explore the Extensive Vulnerability Database
  • Receive Early Alerts on Emerging CVEs
  • Focus on Critical Exploitable Vulnerabilities
  • Streamline Remediation with Integration Options