CVSS: 6.5EPSS: 0%CPEs: 1EXPL: 0CVE-2023-5568 – Samba: heap buffer overflow with freshness tokens in the heimdal kdc
https://notcve.org/view.php?id=CVE-2023-5568
A heap-based Buffer Overflow flaw was discovered in Samba. It could allow a remote, authenticated attacker to exploit this vulnerability to cause a denial of service. Se descubrió una falla de desbordamiento de búfer basada en montón en Samba. Podría permitir que un atacante remoto y autenticado aproveche esta vulnerabilidad para provocar una denegación de servicio. • https://access.redhat.com/security/cve/CVE-2023-5568 https://bugzilla.redhat.com/show_bug.cgi?id=2245174 https://bugzilla.samba.org/show_bug.cgi?id=15491 https://security.netapp.com/advisory/ntap-20231124-0007 https://www.samba.org/samba/history/samba-4.19.2.html • CWE-122: Heap-based Buffer Overflow CWE-787: Out-of-bounds Write •
CVSS: 9.8EPSS: 0%CPEs: 7EXPL: 1CVE-2023-3961 – Samba: smbd allows client access to unix domain sockets on the file system as root
https://notcve.org/view.php?id=CVE-2023-3961
A path traversal vulnerability was identified in Samba when processing client pipe names connecting to Unix domain sockets within a private directory. Samba typically uses this mechanism to connect SMB clients to remote procedure call (RPC) services like SAMR LSA or SPOOLSS, which Samba initiates on demand. However, due to inadequate sanitization of incoming client pipe names, allowing a client to send a pipe name containing Unix directory traversal characters (../). This could result in SMB clients connecting as root to Unix domain sockets outside the private directory. If an attacker or client managed to send a pipe name resolving to an external service using an existing Unix domain socket, it could potentially lead to unauthorized access to the service and consequential adverse events, including compromise or service crashes. • https://access.redhat.com/errata/RHSA-2023:6209 https://access.redhat.com/errata/RHSA-2023:6744 https://access.redhat.com/errata/RHSA-2023:7371 https://access.redhat.com/errata/RHSA-2023:7408 https://access.redhat.com/errata/RHSA-2023:7464 https://access.redhat.com/errata/RHSA-2023:7467 https://access.redhat.com/security/cve/CVE-2023-3961 https://bugzilla.redhat.com/show_bug.cgi?id=2241881 https://bugzilla.samba.org/show_bug.cgi?id=15422 https://lists.fedoraproject.o • CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •
CVSS: 6.5EPSS: 0%CPEs: 7EXPL: 0CVE-2023-4091 – Samba: smb clients can truncate files with read-only permissions
https://notcve.org/view.php?id=CVE-2023-4091
A vulnerability was discovered in Samba, where the flaw allows SMB clients to truncate files, even with read-only permissions when the Samba VFS module "acl_xattr" is configured with "acl_xattr:ignore system acls = yes". The SMB protocol allows opening files when the client requests read-only access but then implicitly truncates the opened file to 0 bytes if the client specifies a separate OVERWRITE create disposition request. The issue arises in configurations that bypass kernel file system permissions checks, relying solely on Samba's permissions. Se descubrió una vulnerabilidad en Samba, donde la falla permite a los clientes SMB truncar archivos, incluso con permisos de solo lectura cuando el módulo Samba VFS "acl_xattr" está configurado con "acl_xattr:ignore system acls = yes". El protocolo SMB permite abrir archivos cuando el cliente solicita acceso de solo lectura, pero luego trunca implícitamente el archivo abierto a 0 bytes si el cliente especifica una solicitud de disposición de creación de SOBRESCRITURA separada. • https://access.redhat.com/errata/RHSA-2023:6209 https://access.redhat.com/errata/RHSA-2023:6744 https://access.redhat.com/errata/RHSA-2023:7371 https://access.redhat.com/errata/RHSA-2023:7408 https://access.redhat.com/errata/RHSA-2023:7464 https://access.redhat.com/errata/RHSA-2023:7467 https://access.redhat.com/security/cve/CVE-2023-4091 https://bugzilla.redhat.com/show_bug.cgi?id=2241882 https://bugzilla.samba.org/show_bug.cgi?id=15439 https://lists.debian.org/ • CWE-276: Incorrect Default Permissions •
CVSS: 6.5EPSS: 0%CPEs: 4EXPL: 0CVE-2023-42670 – Samba: ad dc busy rpc multiple listener dos
https://notcve.org/view.php?id=CVE-2023-42670
A flaw was found in Samba. It is susceptible to a vulnerability where multiple incompatible RPC listeners can be initiated, causing disruptions in the AD DC service. When Samba's RPC server experiences a high load or unresponsiveness, servers intended for non-AD DC purposes (for example, NT4-emulation "classic DCs") can erroneously start and compete for the same unix domain sockets. This issue leads to partial query responses from the AD DC, causing issues such as "The procedure number is out of range" when using tools like Active Directory Users. This flaw allows an attacker to disrupt AD DC services. • https://access.redhat.com/security/cve/CVE-2023-42670 https://bugzilla.redhat.com/show_bug.cgi?id=2241885 https://bugzilla.samba.org/show_bug.cgi?id=15473 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I https://security.netapp.com/advisory/ntap-20231124-0002 https://www.samba.org/samba/security/CVE-2023-42670.html • CWE-400: Uncontrolled Resource Consumption •
CVSS: 6.5EPSS: 0%CPEs: 11EXPL: 0CVE-2023-42669 – Samba: "rpcecho" development server allows denial of service via sleep() call on ad dc
https://notcve.org/view.php?id=CVE-2023-42669
A vulnerability was found in Samba's "rpcecho" development server, a non-Windows RPC server used to test Samba's DCE/RPC stack elements. This vulnerability stems from an RPC function that can be blocked indefinitely. The issue arises because the "rpcecho" service operates with only one worker in the main RPC task, allowing calls to the "rpcecho" server to be blocked for a specified time, causing service disruptions. This disruption is triggered by a "sleep()" call in the "dcesrv_echo_TestSleep()" function under specific conditions. Authenticated users or attackers can exploit this vulnerability to make calls to the "rpcecho" server, requesting it to block for a specified duration, effectively disrupting most services and leading to a complete denial of service on the AD DC. • https://access.redhat.com/errata/RHSA-2023:6209 https://access.redhat.com/errata/RHSA-2023:6744 https://access.redhat.com/errata/RHSA-2023:7371 https://access.redhat.com/errata/RHSA-2023:7408 https://access.redhat.com/errata/RHSA-2023:7464 https://access.redhat.com/errata/RHSA-2023:7467 https://access.redhat.com/security/cve/CVE-2023-42669 https://bugzilla.redhat.com/show_bug.cgi?id=2241884 https://bugzilla.samba.org/show_bug.cgi?id=15474 https://security.netapp.com& • CWE-400: Uncontrolled Resource Consumption •