CVSS: 7.5EPSS: 1%CPEs: 9EXPL: 0CVE-2021-36222 – krb5: Sending a request containing PA-ENCRYPTED-CHALLENGE padata element without using FAST could result in NULL dereference in KDC which leads to DoS
https://notcve.org/view.php?id=CVE-2021-36222
ec_verify in kdc/kdc_preauth_ec.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.18.4 and 1.19.x before 1.19.2 allows remote attackers to cause a NULL pointer dereference and daemon crash. This occurs because a return value is not properly managed in a certain situation. La función ec_verify en el archivo kdc/kdc_preauth_ec.c en el Centro de Distribución de Claves (KDC) en MIT Kerberos 5 (también se conoce como krb5) versiones anteriores a 1.18.4 y versiones 1.19.x anteriores a 1.19.2, permite a atacantes remotos causar una desreferencia de puntero NULL y un bloqueo del daemon. Esto ocurre porque un valor de retorno no es manejado apropiadamente en una situación determinada A flaw was found in krb5. This flaw allows an unauthenticated attacker to cause a NULL dereference in the KDC by sending a request containing a PA-ENCRYPTED-CHALLENGE padata element without using FAST. • https://github.com/krb5/krb5/commit/fc98f520caefff2e5ee9a0026fdf5109944b3562 https://github.com/krb5/krb5/releases https://security.netapp.com/advisory/ntap-20211022-0003 https://security.netapp.com/advisory/ntap-20211104-0007 https://web.mit.edu/kerberos/advisories https://www.debian.org/security/2021/dsa-4944 https://www.oracle.com/security-alerts/cpuoct2021.html https://access.redhat.com/security/cve/CVE-2021-36222 https://bugzilla.redhat.com/show_bug.cgi?id=1983720 • CWE-476: NULL Pointer Dereference •
CVSS: 7.5EPSS: 0%CPEs: 13EXPL: 0CVE-2020-28196 – krb5: unbounded recursion via an ASN.1-encoded Kerberos message in lib/krb5/asn.1/asn1_encode.c may lead to DoS
https://notcve.org/view.php?id=CVE-2020-28196
MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit. MIT Kerberos versión 5 (también se conoce como krb5) versiones anteriores a 1.17.2 y versiones 1.18.x anteriores a 1.18.3, permite una recursividad ilimitada por medio de un mensaje Kerberos codificado en ASN.1 porque el soporte de la biblioteca lib/krb5 /asn.1/asn1_encode.c para longitudes indefinidas BER carece un límite de recursividad A flaw was found in krb5. MIT Kerberos 5 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit. • https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E https://lists.debian.org/debian-lts-announce/2020/11/msg00011.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45KKOZQWIIIW5C45PJVGQ32AXBSYNBE7 https://lists.fedoraproject.org/archives • CWE-674: Uncontrolled Recursion •
CVSS: 7.5EPSS: 0%CPEs: 4EXPL: 0CVE-2019-14844
https://notcve.org/view.php?id=CVE-2019-14844
A flaw was found in, Fedora versions of krb5 from 1.16.1 to, including 1.17.x, in the way a Kerberos client could crash the KDC by sending one of the RFC 4556 "enctypes". A remote unauthenticated user could use this flaw to crash the KDC. Se encontró un fallo en Fedora versiones de krb5 desde 1.16.1 hasta 1.17.x (incluyéndola), en la manera en que un cliente de Kerberos podría bloquear el KDC mediante el envío de uno de los "enctypes" 4556 de RFC. Un usuario no autenticado remoto podría utilizar este fallo para bloquear el KDC. • https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14844 https://github.com/krb5/krb5/pull/981 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/54ZYKEJZ77BXZWGF4NEVKC33ESVROEYC https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N4LS5PIJOCNOUZGLO2OBT6GY334PUOSW https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TDE2QOKK4I4TV4WV74ZQWICZ4HJN2MOK https://security.netapp.com/advisory/ntap-20220325-0003 • CWE-628: Function Call with Incorrectly Specified Arguments •
CVSS: 6.5EPSS: 0%CPEs: 5EXPL: 0CVE-2017-7562 – krb5: Authentication bypass by improper validation of certificate EKU and SAN
https://notcve.org/view.php?id=CVE-2017-7562
An authentication bypass flaw was found in the way krb5's certauth interface before 1.16.1 handled the validation of client certificates. A remote attacker able to communicate with the KDC could potentially use this flaw to impersonate arbitrary principals under rare and erroneous circumstances. Se ha encontrado un error de omisión de autenticación en la forma en que la interfaz de certauth de krb5 en versiones anteriores a la 1.16.1 gestionaba la validación de los certificados de cliente. Un atacante remoto capaz de comunicarse con el KDC podría utilizar este fallo para hacerse pasar por directores arbitrarios en circunstancias poco frecuentes y erróneas. An authentication bypass flaw was found in the way krb5's certauth interface handled the validation of client certificates. • http://www.securityfocus.com/bid/100511 https://access.redhat.com/errata/RHSA-2018:0666 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7562 https://github.com/krb5/krb5/pull/694 https://github.com/krb5/krb5/pull/694/commits/1de6ca2f2eb1fdbab51f1549a25a6903aefcc196 https://github.com/krb5/krb5/pull/694/commits/50fe4074f188c2d4da0c421e96553acea8378db2 https://github.com/krb5/krb5/pull/694/commits/b7af544e50a4d8291524f590e20dd44430bf627d https://access.redhat.com/security/cve/CVE-2017-7562 https:/ • CWE-287: Improper Authentication CWE-295: Improper Certificate Validation •
CVSS: 6.5EPSS: 0%CPEs: 8EXPL: 0CVE-2018-5729 – krb5: null dereference in kadmind or DN container check bypass by supplying special crafted data
https://notcve.org/view.php?id=CVE-2018-5729
MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to cause a denial of service (NULL pointer dereference) or bypass a DN container check by supplying tagged data that is internal to the database module. MIT krb5, en versiones 1.6 o posteriores, permite que un kadmin autenticado con permiso para añadir entidades de seguridad a una base de datos LDAP Kerberos provoque una denegación de servicio (desreferencia de puntero NULL) u omita una comprobación de contenedor DN proporcionando datos etiquetados internos del módulo de la base de datos. • http://www.securitytracker.com/id/1042071 https://access.redhat.com/errata/RHBA-2019:0327 https://access.redhat.com/errata/RHSA-2018:3071 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891869 https://bugzilla.redhat.com/show_bug.cgi?id=1551083 https://github.com/krb5/krb5/commit/e1caf6fb74981da62039846931ebdffed71309d1 https://lists.debian.org/debian-lts-announce/2019/01/msg00020.html https://lists.debian.org/debian-lts-announce/2021/09/msg00019.html https://lists.fedoraproject.org/ar • CWE-476: NULL Pointer Dereference •