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 •
CVSS: 5.6EPSS: 0%CPEs: 1EXPL: 0CVE-2018-16868
https://notcve.org/view.php?id=CVE-2018-16868
A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server. Se ha detectado un ataque de oráculo de relleno basado en canales laterales de tipo Bleichenbacher en la manera en la que gnutls maneja la verificación de los datos PKCS#1 v1.5 descifrados de un cifrado RSA. Un atacante que sea capaz de ejecutar un proceso en el mismo núcleo físico que el proceso víctima podría usarlo para extraer texto plano o, en algunos casos, desactualizar algunas conexiones TLS a un servidor vulnerable. • http://cat.eyalro.net http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00017.html http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00068.html http://www.securityfocus.com/bid/106080 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16868 • CWE-203: Observable Discrepancy •
CVSS: 5.6EPSS: 0%CPEs: 11EXPL: 0CVE-2018-10846 – gnutls: "Just in Time" PRIME + PROBE cache-based side channel attack can lead to plaintext recovery
https://notcve.org/view.php?id=CVE-2018-10846
A cache-based side channel in GnuTLS implementation that leads to plain text recovery in cross-VM attack setting was found. An attacker could use a combination of "Just in Time" Prime+probe attack in combination with Lucky-13 attack to recover plain text using crafted packets. Se ha detectado un canal lateral basado en memoria caché en la implementación GnuTLS que conduce a un ataque de recuperación de texto plano a través de una máquina virtual. Un atacante podría utilizar una combinación de un ataque "Just in Time" Prime+probe con un ataque Lucky-13 para recuperar texto plano usando paquetes manipulados. A cache-based side channel attack was found in the way GnuTLS implements CBC-mode cipher suites. • http://www.securityfocus.com/bid/105138 https://access.redhat.com/errata/RHSA-2018:3050 https://access.redhat.com/errata/RHSA-2018:3505 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10846 https://eprint.iacr.org/2018/747 https://gitlab.com/gnutls/gnutls/merge_requests/657 https://lists.debian.org/debian-lts-announce/2018/10/msg00022.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ https://lists.fedor • CWE-327: Use of a Broken or Risky Cryptographic Algorithm CWE-385: Covert Timing Channel •
CVSS: 5.9EPSS: 0%CPEs: 11EXPL: 0CVE-2018-10844 – gnutls: HMAC-SHA-256 vulnerable to Lucky thirteen attack due to not enough dummy function calls
https://notcve.org/view.php?id=CVE-2018-10844
It was found that the GnuTLS implementation of HMAC-SHA-256 was vulnerable to a Lucky thirteen style attack. Remote attackers could use this flaw to conduct distinguishing attacks and plaintext-recovery attacks via statistical analysis of timing data using crafted packets. Se ha detectado que la implementación GnuTLS de HMAC-SHA-256 era vulnerable a un ataque de estilo Lucky Thirteen. Los atacantes remotos podrían utilizar este fallo para realizar ataques de distinción y de recuperación en texto plano mediante análisis estadísticos de datos temporales mediante paquetes manipulados. It was found that GnuTLS's implementation of HMAC-SHA-256 was vulnerable to Lucky Thirteen-style attack. • http://www.securityfocus.com/bid/105138 https://access.redhat.com/errata/RHSA-2018:3050 https://access.redhat.com/errata/RHSA-2018:3505 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10844 https://eprint.iacr.org/2018/747 https://gitlab.com/gnutls/gnutls/merge_requests/657 https://lists.debian.org/debian-lts-announce/2018/10/msg00022.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ILMOWPKMTZAIMK5F32TUMO34XCABUCFJ https://lists.fedor • CWE-327: Use of a Broken or Risky Cryptographic Algorithm CWE-385: Covert Timing Channel •