CVE-2023-51443

CVSS 3.1 Score 5.9 of 10 (medium)

Details

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

Summary

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.

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