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

GnuTLS -- null pointer dereference

Affected packages
		gnutls	<	3.6.15

Details

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.

[source]

References

CVE Name	CVE-2020-24659
URL	https://gnutls.org/security-new.html#GNUTLS-SA-2020-09-04