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VuXML IDDescription
ef5b4f5f-a658-11ea-80d7-001cc0382b2fGnuTLS -- flaw in TLS session ticket key construction

The GnuTLS project reports:

It was found that GnuTLS 3.6.4 introduced a regression in the TLS protocol implementation. This caused the TLS server to not securely construct a session ticket encryption key considering the application supplied secret, allowing a MitM attacker to bypass authentication in TLS 1.3 and recover previous conversations in TLS 1.2.


Discovery 2020-06-03
Entry 2020-06-04
gnutls
< 3.6.14

https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03
CVE-2020-13777
2272e6f1-f029-11ea-838a-0011d823eebdGnuTLS -- null pointer dereference

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.


Discovery 2020-09-04
Entry 2020-09-06
gnutls
< 3.6.15

https://gnutls.org/security-new.html#GNUTLS-SA-2020-09-04
CVE-2020-24659
d887b3d9-7366-11ea-b81a-001cc0382b2fGnuTLS -- flaw in DTLS protocol implementation

The GnuTLS project reports:

It was found that GnuTLS 3.6.3 introduced a regression in the DTLS protocol implementation. This caused the DTLS client to not contribute any randomness to the DTLS negotiation breaking the security guarantees of the DTLS protocol.


Discovery 2020-03-31
Entry 2020-03-31
gnutls
< 3.6.13

https://gnutls.org/security-new.html#GNUTLS-SA-2020-03-31
CVE-2020-11501