CVSS: 9.0EPSS: 0%CPEs: 33EXPL: 0CVE-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
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, podía confundirse sobre el usuario que representa un ticket si no requería estrictamente un PAC de Kerberos y siempre usaba los SIDs encontrados dentro. • https://bugzilla.redhat.com/show_bug.cgi?id=2019732 https://security.gentoo.org/glsa/202309-06 https://www.samba.org/samba/security/CVE-2020-25719.html https://access.redhat.com/security/cve/CVE-2020-25719 • CWE-287: Improper Authentication CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 8.8EPSS: 0%CPEs: 3EXPL: 0CVE-2021-3738
https://notcve.org/view.php?id=CVE-2021-3738
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 the use-after-free could instead allow different user state to be pointed at and this might allow more privileged access. En DCE/RPC es posible compartir los manejadores (cookies para el estado de los recursos) entre múltiples conexiones por medio de un mecanismo llamado "association groups". • https://bugzilla.redhat.com/show_bug.cgi?id=2021726 https://bugzilla.samba.org/show_bug.cgi?id=14468 https://security.gentoo.org/glsa/202309-06 https://www.samba.org/samba/security/CVE-2021-3738.html • CWE-416: Use After Free •
CVSS: 8.8EPSS: 0%CPEs: 12EXPL: 0CVE-2020-25722
https://notcve.org/view.php?id=CVE-2020-25722
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 • https://bugzilla.redhat.com/show_bug.cgi?id=2019764 https://security.gentoo.org/glsa/202309-06 https://www.samba.org/samba/security/CVE-2020-25722.html • CWE-863: Incorrect Authorization •
CVSS: 6.5EPSS: 0%CPEs: 7EXPL: 0CVE-2021-3671
https://notcve.org/view.php?id=CVE-2021-3671
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 • https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C https://bugzilla.samba.org/show_bug.cgi?id=14770%2C https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html https://security.netapp.com/advisory/ntap-20221215-0002 https://security.netapp.com/advisory/ntap-20230216-0008 https://www.debian.org/security/2022/dsa-5287 • CWE-476: NULL Pointer Dereference •
CVSS: 6.8EPSS: 0%CPEs: 8EXPL: 0CVE-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
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 https://lists.debian.org/debian-lts-announce/2021/05/msg00023.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3EP2VJ73OVBPVSOSTVOMGIEQA3MWF6F7 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZAF6L2M6CNAJ2YYYGXPWETTW5YLCWTVT https://security.gentoo.org/glsa/202105-22 https://security.netapp.com/advisory/ntap-20210430-0001 https://www.samba.org/samba/security/CVE-2021-20254 • CWE-125: Out-of-bounds Read •