CVSS: 9.8EPSS: 0%CPEs: 19EXPL: 0CVE-2023-3326 – Network authentication attack via pam_krb5
https://notcve.org/view.php?id=CVE-2023-3326
pam_krb5 authenticates a user by essentially running kinit with the password, getting a ticket-granting ticket (tgt) from the Kerberos KDC (Key Distribution Center) over the network, as a way to verify the password. However, if a keytab is not provisioned on the system, pam_krb5 has no way to validate the response from the KDC, and essentially trusts the tgt provided over the network as being valid. In a non-default FreeBSD installation that leverages pam_krb5 for authentication and does not have a keytab provisioned, an attacker that is able to control both the password and the KDC responses can return a valid tgt, allowing authentication to occur for any user on the system. • https://security.FreeBSD.org/advisories/FreeBSD-SA-23:04.pam_krb5.asc https://security.FreeBSD.org/advisories/FreeBSD-SA-23:09.pam_krb5.asc https://security.netapp.com/advisory/ntap-20230714-0005 • CWE-287: Improper Authentication CWE-303: Incorrect Implementation of Authentication Algorithm •
CVSS: 5.5EPSS: 0%CPEs: 23EXPL: 0CVE-2021-29626
https://notcve.org/view.php?id=CVE-2021-29626
In FreeBSD 13.0-STABLE before n245117, 12.2-STABLE before r369551, 11.4-STABLE before r369559, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, copy-on-write logic failed to invalidate shared memory page mappings between multiple processes allowing an unprivileged process to maintain a mapping after it is freed, allowing the process to read private data belonging to other processes or the kernel. En FreeBSD versiones 13.0-STABLE anteriores a n245117, versiones 12.2-STABLE anteriores a r369551, versiones 11.4-STABLE anteriores a r369559, versiones 13.0-RC5 anteriores a p1, versiones 12.2-RELEASE anteriores a p6 y versiones 11.4-RELEASE anteriores a p9, la lógica de copy-on-write fallaba al invalidar las asignaciones de páginas de memoria compartida entre múltiples procesos, permitiendo que un proceso sin privilegios mantuviera una asignación después de ser liberada, permitiendo que el proceso leyera datos privados pertenecientes a otros procesos o al kernel • https://security.FreeBSD.org/advisories/FreeBSD-SA-21:08.vm.asc https://security.netapp.com/advisory/ntap-20210423-0008 • CWE-416: Use After Free •
CVSS: 7.5EPSS: 0%CPEs: 23EXPL: 0CVE-2020-25584
https://notcve.org/view.php?id=CVE-2020-25584
In FreeBSD 13.0-STABLE before n245118, 12.2-STABLE before r369552, 11.4-STABLE before r369560, 13.0-RC5 before p1, 12.2-RELEASE before p6, and 11.4-RELEASE before p9, a superuser inside a FreeBSD jail configured with the non-default allow.mount permission could cause a race condition between the lookup of ".." and remounting a filesystem, allowing access to filesystem hierarchy outside of the jail. En FreeBSD versiones 13.0-STABLE anteriores a n245118, versiones 12.2-STABLE anteriores a r369552, versiones 11.4-STABLE anteriores a r369560, versiones 13.0-RC5 anteriores a p1, versiones 12.2-RELEASE anteriores a p6 y versiones 11.4-RELEASE anteriores a p9, un superusuario dentro de una jaula FreeBSD configurada con el permiso por defecto allow.mount podría causar una condición de carrera entre la búsqueda de ".." y volver a montar un sistema de archivos, permitiendo el acceso a la jerarquía del sistema de archivos fuera de jail • https://security.FreeBSD.org/advisories/FreeBSD-SA-21:10.jail_mount.asc https://security.netapp.com/advisory/ntap-20210423-0009 • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 10.0EPSS: 0%CPEs: 29EXPL: 0CVE-2020-25583
https://notcve.org/view.php?id=CVE-2020-25583
In FreeBSD 12.2-STABLE before r368250, 11.4-STABLE before r368253, 12.2-RELEASE before p1, 12.1-RELEASE before p11 and 11.4-RELEASE before p5 when processing a DNSSL option, rtsold(8) decodes domain name labels per an encoding specified in RFC 1035 in which the first octet of each label contains the label's length. rtsold(8) did not validate label lengths correctly and could overflow the destination buffer. En FreeBSD versiones 12.2-STABLE anteriores a r368250, versiones 11.4-STABLE anteriores a r368253, versiones 12.2-RELEASE anteriores a p1, versiones 12.1-RELEASE anteriores a p11 y versiones 11.4-RELEASE anteriores a p5, cuando se procesa una opción DNSSL, rtsold(8) decodifica las etiquetas de nombre de dominio según una codificación especificada en RFC 1035 en el que el primer octeto de cada etiqueta contiene la longitud de la etiqueta. rtsold(8) no comprobó las longitudes de las etiquetas correctamente y podría desbordar el búfer de destino • https://security.FreeBSD.org/advisories/FreeBSD-SA-20:32.rtsold.asc https://security.netapp.com/advisory/ntap-20210423-0004 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') •
CVSS: 5.3EPSS: 0%CPEs: 29EXPL: 0CVE-2020-7464
https://notcve.org/view.php?id=CVE-2020-7464
In FreeBSD 12.2-STABLE before r365730, 11.4-STABLE before r365738, 12.1-RELEASE before p10, 11.4-RELEASE before p4, and 11.3-RELEASE before p14, a programming error in the ure(4) device driver caused some Realtek USB Ethernet interfaces to incorrectly report packets with more than 2048 bytes in a single USB transfer as having a length of only 2048 bytes. An adversary can exploit this to cause the driver to misinterpret part of the payload of a large packet as a separate packet, and thereby inject packets across security boundaries such as VLANs. En FreeBSD versiones 12.2-STABLE anteriores a r365730, 11.4-STABLE anteriores a r365738, 12.1-RELEASE anteriores a p10, 11.4-RELEASE anteriores a p4 y 11.3-RELEASE anteriores a p14, un error de programación en el controlador de dispositivo ure(4) causó que algunas interfaces Realtek USB Ethernet reportaran incorrectamente paquetes con más de 2048 bytes en una sola transferencia USB con una longitud de solo 2048 bytes. Un adversario puede explotar esto para causar que el controlador interprete inapropiadamente parte de la carga útil de un paquete grande como un paquete separado y, por lo tanto, inyectar paquetes a través de los límites de seguridad, como las VLAN. • https://security.FreeBSD.org/advisories/FreeBSD-SA-20:27.ure.asc • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') •