Описание
Security update for samba
This update for samba fixes the following issues:
- CVE-2023-4091: Fixed a bug where a client can truncate file with read-only permissions. (bsc#1215904)
- CVE-2023-42669: Fixed a bug in 'rpcecho' development server which allows Denial of Service via sleep() call on AD DC. (bsc#1215905)
- CVE-2023-42670: Fixed the procedure number which was out of range when starting Active Directory Users and Computers. (bsc#1215906)
- CVE-2023-3961: Fixed an unsanitized client pipe name passed to local_np_connect(). (bsc#1215907)
- CVE-2023-4154: Fixed a bug in dirsync which allows SYSTEM access with only 'GUID_DRS_GET_CHANGES' right. (bsc#1215908)
Список пакетов
Image SLES15-SP5-Azure-3P
Image SLES15-SP5-Azure-Basic
Image SLES15-SP5-Azure-Standard
Image SLES15-SP5-BYOS-Azure
Image SLES15-SP5-BYOS-EC2
Image SLES15-SP5-BYOS-GCE
Image SLES15-SP5-CHOST-BYOS-Aliyun
Image SLES15-SP5-CHOST-BYOS-Azure
Image SLES15-SP5-CHOST-BYOS-EC2
Image SLES15-SP5-CHOST-BYOS-GCE
Image SLES15-SP5-CHOST-BYOS-GDC
Image SLES15-SP5-CHOST-BYOS-SAP-CCloud
Image SLES15-SP5-EC2
Image SLES15-SP5-GCE
Image SLES15-SP5-HPC-Azure
Image SLES15-SP5-HPC-BYOS-Azure
Image SLES15-SP5-HPC-BYOS-EC2
Image SLES15-SP5-HPC-BYOS-GCE
Image SLES15-SP5-Hardened-BYOS-Azure
Image SLES15-SP5-Hardened-BYOS-EC2
Image SLES15-SP5-Hardened-BYOS-GCE
Image SLES15-SP5-SAP-Azure-3P
Image SLES15-SP5-SAP-Azure-LI-BYOS
Image SLES15-SP5-SAP-Azure-LI-BYOS-Production
Image SLES15-SP5-SAP-Azure-VLI-BYOS
Image SLES15-SP5-SAP-Azure-VLI-BYOS-Production
Image SLES15-SP5-SAP-BYOS-Azure
Image SLES15-SP5-SAP-BYOS-EC2
Image SLES15-SP5-SAP-BYOS-GCE
Image SLES15-SP5-SAP-Hardened-Azure
Image SLES15-SP5-SAP-Hardened-BYOS-Azure
Image SLES15-SP5-SAP-Hardened-BYOS-EC2
Image SLES15-SP5-SAP-Hardened-BYOS-GCE
Image SLES15-SP5-SAP-Hardened-GCE
Image SLES15-SP5-SAPCAL-Azure
Image SLES15-SP5-SAPCAL-EC2
Image SLES15-SP5-SAPCAL-GCE
SUSE Linux Enterprise High Availability Extension 15 SP5
SUSE Linux Enterprise Micro 5.5
SUSE Linux Enterprise Module for Basesystem 15 SP5
openSUSE Leap 15.5
Ссылки
- Link for SUSE-SU-2023:4046-1
- E-Mail link for SUSE-SU-2023:4046-1
- SUSE Security Ratings
- SUSE Bug 1215904
- SUSE Bug 1215905
- SUSE Bug 1215906
- SUSE Bug 1215907
- SUSE Bug 1215908
- SUSE CVE CVE-2023-3961 page
- SUSE CVE CVE-2023-4091 page
- SUSE CVE CVE-2023-4154 page
- SUSE CVE CVE-2023-42669 page
- SUSE CVE CVE-2023-42670 page
Описание
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.
Затронутые продукты
Ссылки
- CVE-2023-3961
- SUSE Bug 1215907
Описание
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.
Затронутые продукты
Ссылки
- CVE-2023-4091
- SUSE Bug 1215904
Описание
A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs). This flaw allows RODCs and users possessing the GET_CHANGES right to access all attributes, including sensitive secrets and passwords. Even in a default setup, RODC DC accounts, which should only replicate some passwords, can gain access to all domain secrets, including the vital krbtgt, effectively eliminating the RODC / DC distinction. Furthermore, the vulnerability fails to account for error conditions (fail open), like out-of-memory situations, potentially granting access to secret attributes, even under low-privileged attacker influence.
Затронутые продукты
Ссылки
- CVE-2023-4154
- SUSE Bug 1215908
Описание
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. The DoS affects all other services as "rpcecho" runs in the main RPC task.
Затронутые продукты
Ссылки
- CVE-2023-42669
- SUSE Bug 1215905
Описание
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.
Затронутые продукты
Ссылки
- CVE-2023-42670
- SUSE Bug 1215906