FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

GnuTLS -- null pointer dereference

Affected packages
gnutls < 3.6.15


VuXML ID 2272e6f1-f029-11ea-838a-0011d823eebd
Discovery 2020-09-04
Entry 2020-09-06

The GnuTLS project reports:

It was found by oss-fuzz that the server sending a "no_renegotiation" alert in an unexpected timing, followed by an invalid second handshake can cause a TLS 1.3 client to crash via a null-pointer dereference. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.


CVE Name CVE-2020-24659