Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the "signature_algorithms_cert" TLS extension.
The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack.
NetModule Router Software including version 4.4 is not affected by this CVE.
More information:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=2020-1967