CVE-2020-25722 – Gentoo Linux Security Advisory 202309-06

https://notcve.org/view.php?id=CVE-2020-25722

11 Nov 2021 — Multiple flaws were found in the way samba AD DC implemented access and conformance checking of stored data. An attacker could use this flaw to cause total domain compromise. Se han encontrado múltiples fallos en la forma en que samba AD DC implementa el acceso y la comprobación de conformidad de los datos almacenados. Un atacante podría usar este fallo para causar un compromiso total del dominio Stefan Metzmacher discovered that Samba incorrectly handled SMB1 client connections. A remote attacker could pos... • https://bugzilla.redhat.com/show_bug.cgi?id=2019764 • CWE-863: Incorrect Authorization •

CVE-2021-3738 – Gentoo Linux Security Advisory 202309-06

https://notcve.org/view.php?id=CVE-2021-3738

11 Nov 2021 — In DCE/RPC it is possible to share the handles (cookies for resource state) between multiple connections via a mechanism called 'association groups'. These handles can reference connections to our sam.ldb database. However while the database was correctly shared, the user credentials state was only pointed at, and when one connection within that association group ended, the database would be left pointing at an invalid 'struct session_info'. The most likely outcome here is a crash, but it is possible that t... • https://bugzilla.redhat.com/show_bug.cgi?id=2021726 • CWE-416: Use After Free •

CVE-2020-25719 – samba: Samba AD DC did not always rely on the SID and PAC in Kerberos tickets

https://notcve.org/view.php?id=CVE-2020-25719

11 Nov 2021 — A flaw was found in the way Samba, as an Active Directory Domain Controller, implemented Kerberos name-based authentication. The Samba AD DC, could become confused about the user a ticket represents if it did not strictly require a Kerberos PAC and always use the SIDs found within. The result could include total domain compromise. Se encontró un fallo en la forma en que Samba, como controlador de dominio de Active Directory, implementaba la autenticación basada en nombres de Kerberos. El AD DC de Samba, pod... • https://bugzilla.redhat.com/show_bug.cgi?id=2019732 • CWE-287: Improper Authentication CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •

CVE-2020-25718 – Gentoo Linux Security Advisory 202309-06

https://notcve.org/view.php?id=CVE-2020-25718

11 Nov 2021 — A flaw was found in the way samba, as an Active Directory Domain Controller, is able to support an RODC (read-only domain controller). This would allow an RODC to print administrator tickets. Se encontró un fallo en la forma en que samba, como controlador de dominio de Active Directory, es capaz de soportar un RODC (controlador de dominio de sólo lectura). Esto permitiría a un RODC imprimir tickets de administrador Stefan Metzmacher discovered that Samba incorrectly handled SMB1 client connections. A remote... • https://bugzilla.redhat.com/show_bug.cgi?id=2019726 • CWE-862: Missing Authorization •

CVE-2021-3671 – Ubuntu Security Notice USN-5142-2

https://notcve.org/view.php?id=CVE-2021-3671

12 Oct 2021 — A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server. Se ha encontrado una desreferencia de puntero null en la forma en que el servidor kerberos de Samba manejaba el sname faltante en TGS-REQ (Ticket Granting Server - Request). Un usuario autenticado podría usar este fallo para bloquear el servidor samba Isaac Boukris and Andrew Bartlett discovered that H... • https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C • CWE-476: NULL Pointer Dereference •

CVE-2021-20254 – samba: Negative idmap cache entries can cause incorrect group entries in the Samba file server process token

https://notcve.org/view.php?id=CVE-2021-20254

30 Apr 2021 — A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity. • https://bugzilla.redhat.com/show_bug.cgi?id=1949442 • CWE-125: Out-of-bounds Read •

CVE-2020-27840 – Ubuntu Security Notice USN-4888-2

https://notcve.org/view.php?id=CVE-2020-27840

25 Mar 2021 — A flaw was found in samba. Spaces used in a string around a domain name (DN), while supposed to be ignored, can cause invalid DN strings with spaces to instead write a zero-byte into out-of-bounds memory, resulting in a crash. The highest threat from this vulnerability is to system availability. Se ha encontrado un fallo en samba. Los espacios usados en una cadena alrededor de un nombre de dominio (DN), aunque se supone que deben ser ignorados, pueden causar cadenas DN no válidas con espacios en lugar ... • https://bugzilla.redhat.com/show_bug.cgi?id=1941400 • CWE-125: Out-of-bounds Read •

CVE-2021-20277 – samba: Out of bounds read in AD DC LDAP server

https://notcve.org/view.php?id=CVE-2021-20277

25 Mar 2021 — A flaw was found in Samba's libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability. Se encontró un fallo en libldb de Samba. Múltiples espacios iniciales consecutivos en un atributo LDAP pueden conllevar a una escritura de memoria fuera de los límites, conllevando a un bloqueo del proceso del servidor LDAP que maneja la... • https://bugzilla.redhat.com/show_bug.cgi?id=1941402 • CWE-125: Out-of-bounds Read CWE-787: Out-of-bounds Write •

CVE-2020-17049 – Kerberos KDC Security Feature Bypass Vulnerability

https://notcve.org/view.php?id=CVE-2020-17049

11 Nov 2020 —

A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket can be used for delegation via Kerberos Constrained Delegation (KCD).

To exploit the vulnerability, a compromised service that is configured to use KCD could tamper with a service ticket that is not valid for delegation to force the KDC to accept it.

The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.

Vulnerabilidad d... • http://www.openwall.com/lists/oss-security/2021/11/10/3 • CWE-345: Insufficient Verification of Data Authenticity CWE-863: Incorrect Authorization •

CVE-2020-14318 – samba: Missing handle permissions check in SMB1/2/3 ChangeNotify

https://notcve.org/view.php?id=CVE-2020-14318

02 Nov 2020 — A flaw was found in the way samba handled file and directory permissions. An authenticated user could use this flaw to gain access to certain file and directory information which otherwise would be unavailable to the attacker. Se encontró un fallo en la manera en que samba manejaba los permisos de archivos y directorios. Un usuario autenticado podría usar este fallo para conseguir acceso a determinada información de archivos y directorios que de otra manera no estaría disponible para el atacante A flaw... • https://bugzilla.redhat.com/show_bug.cgi?id=1892631 • CWE-266: Incorrect Privilege Assignment CWE-269: Improper Privilege Management •