CVSS: 7.5EPSS: 0%CPEs: 6EXPL: 1CVE-2020-24659 – gnutls: Heap buffer overflow in handshake with no_renegotiation alert sent
https://notcve.org/view.php?id=CVE-2020-24659
An issue was discovered in GnuTLS before 3.6.15. A server can trigger a NULL pointer dereference in a TLS 1.3 client if a no_renegotiation alert is sent with unexpected timing, and then an invalid second handshake occurs. The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure. Se detectó un problema en GnuTLS versiones anteriores a 3.6.15. Un servidor puede desencadenar una desreferencia del puntero NULL en un cliente TLS versión 1.3, si una alerta no_renegotiation es enviada con una sincronización no prevista y luego se produce un segundo protocolo de enlace no válido. • http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00054.html http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00060.html https://gitlab.com/gnutls/gnutls/-/issues/1071 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/62BUAI4FQQLG6VTKRT7SUZPGJJ4NASQ3 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AWN56FDLQQXT2D2YHNI4TYH432TDMQ7N https://security.gentoo.org/glsa/202009-01 https://security.netapp.com/adviso • CWE-20: Improper Input Validation CWE-476: NULL Pointer Dereference CWE-787: Out-of-bounds Write •
CVSS: 7.4EPSS: 0%CPEs: 6EXPL: 0CVE-2020-13777 – gnutls: session resumption works without master key allowing MITM
https://notcve.org/view.php?id=CVE-2020-13777
GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application. GnuTLS versiones 3.6.x anteriores a 3.6.14, usa una criptografía incorrecta para cifrar un ticket de sesión (una pérdida de confidencialidad en TLS versión 1.2, y un desvío de autenticación en TLS versión 1.3). La primera versión afectada es la 3.6.4 (24-09-2018) debido a un error en un commit del 18-09-2018. • http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00015.html https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6C4DHUKV6M6SJ5CV6KVHZNHNF7HCUE5P https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6RTXZOXC4MHTFE2HKY6IAZMF2WHD2WMV https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRQBFK3UZ7SV76IYDTS4PS6ABS2DSJHK https://lists.fedoraproject.org/archi • CWE-327: Use of a Broken or Risky Cryptographic Algorithm CWE-345: Insufficient Verification of Data Authenticity •
CVSS: 7.4EPSS: 0%CPEs: 6EXPL: 0CVE-2020-11501 – gnutls: DTLS client hello contains a random value of all zeroes
https://notcve.org/view.php?id=CVE-2020-11501
GnuTLS 3.6.x before 3.6.13 uses incorrect cryptography for DTLS. The earliest affected version is 3.6.3 (2018-07-16) because of an error in a 2017-10-06 commit. The DTLS client always uses 32 '\0' bytes instead of a random value, and thus contributes no randomness to a DTLS negotiation. This breaks the security guarantees of the DTLS protocol. GnuTLS versiones 3.6.x anteriores a 3.6.13, usa una criptografía incorrecta para DTLS. • http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00015.html https://gitlab.com/gnutls/gnutls/-/commit/5b595e8e52653f6c5726a4cdd8fddeb6e83804d2 https://gitlab.com/gnutls/gnutls/-/issues/960 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WDYY3R4F5CUTFAMXH2C5NKYFVDEJLTT7 https://security.gentoo.org/glsa/202004-06 https://security.netapp.com/advis • CWE-327: Use of a Broken or Risky Cryptographic Algorithm CWE-330: Use of Insufficiently Random Values •
CVSS: 7.5EPSS: 1%CPEs: 3EXPL: 1CVE-2019-3836 – gnutls: invalid pointer access upon receiving async handshake messages
https://notcve.org/view.php?id=CVE-2019-3836
It was discovered in gnutls before version 3.6.7 upstream that there is an uninitialized pointer access in gnutls versions 3.6.3 or later which can be triggered by certain post-handshake messages. Se descubrió en gnutls, antes de la versión 3.6.7 upstream, que hay un acceso de puntero no inicializado en gnutls, en versiones 3.6.4 o posteriores, que puede desencadenarse por determinados mensajes "post-handshake". A flaw was found in the way gnutls handled malformed TLS 1.3 asynchronous messages. An attacker could use this flaw to crash an application compiled with gnutls via invalid pointer access. • http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html https://access.redhat.com/errata/RHSA-2019:3600 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3836 https://gitlab.com/gnutls/gnutls/issues/704 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3ETBUFBB4G7AITAOUYPGXVMBGVXKUAN https://security.gentoo.org/glsa/201904-14 https://security.netapp.com/advisory/ntap-20190502-0005 https://usn.ubuntu.com/3999-1 https://access. • CWE-456: Missing Initialization of a Variable CWE-824: Access of Uninitialized Pointer •
CVSS: 7.5EPSS: 1%CPEs: 2EXPL: 2CVE-2019-3829 – gnutls: use-after-free/double-free in certificate verification
https://notcve.org/view.php?id=CVE-2019-3829
A vulnerability was found in gnutls versions from 3.5.8 before 3.6.7. A memory corruption (double free) vulnerability in the certificate verification API. Any client or server application that verifies X.509 certificates with GnuTLS 3.5.8 or later is affected. Se ha descubierto una vulnerabilidad en gnutls, desde la versión 3.5.8 hasta antes de la 3.6.7. Hay una vulnerabilidad de corrupción de memoria (doble liberación o "double free") en la API de verificación de certificados. • http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html https://access.redhat.com/errata/RHSA-2019:3600 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3829 https://gitlab.com/gnutls/gnutls/issues/694 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A3ETBUFBB4G7AITAOUYPGXVMBGVXKUAN https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7TJIBRJWGWSH6XIO2MXIQ3W6ES4R6I4 https://lists.fedoraproject.org/archives/list/ • CWE-415: Double Free CWE-416: Use After Free •