An issue was discovered in LINBIT csync2 through 2.0. It does not correctly check for the return value GNUTLS_E_WARNING_ALERT_RECEIVED of the gnutls_handshake() function. It neglects to call this function again, as required by the design of the API.
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2019-15523.json"