The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2023:4040-1 advisory.

    - CVE-2023-4091: Fixed a bug where a client can truncate file with read-only permissions. (bsc#1215904)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2023-416 advisory.

    Samba is vulnerable to path traversal due to insufficient sanitization of clients incoming pipe names.
    This can lead to the client connecting to as root to a Unix domain socket outside of the Samba private     directory. (CVE-2023-3961)

    SMB client can truncate files to 0 bytes by opening files with OVERWRITE disposition when using the     acl_xattr Samba VFS module with the smb.conf setting acl_xattr:ignore system acls = yes (CVE-2023-4091)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5525 advisory.

  - 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. (CVE-2023-3961)

  - 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. (CVE-2023-4091)

  - 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. (CVE-2023-4154)

  - 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. (CVE-2023-42669)

  - 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.
    (CVE-2023-42670)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6425-3 advisory.

    USN-6425-1 fixed vulnerabilities in Samba. This update provides the corresponding updates for Ubuntu     23.10.



Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7371 advisory.

    Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common     Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and     various information.

    Security Fix(es):

    * samba: smbd allows client access to unix domain sockets on the file system as root (CVE-2023-3961)

    * samba: SMB clients can truncate files with read-only permissions (CVE-2023-4091)

    * samba: rpcecho development server allows denial of service via sleep() call on AD DC (CVE-2023-42669)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2023:7467 advisory.

    Samba is an open-source implementation of the Server Message Block (SMB) protocol and the related Common     Internet File System (CIFS) protocol, which allow PC-compatible machines to share files, printers, and     various information.

    Security Fix(es):

    * samba: smbd allows client access to unix domain sockets on the file system as root (CVE-2023-3961)

    * samba: SMB clients can truncate files with read-only permissions (CVE-2023-4091)

    * samba: rpcecho development server allows denial of service via sleep() call on AD DC (CVE-2023-42669)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the samba packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing     Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not     validate a field in the network packet that contains the count of elements in an array-like structure. By     passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This     flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a     denial of service condition. (CVE-2023-34966)

  - A Type Confusion vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing     Spotlight mdssvc RPC packets, one encoded data structure is a key-value style dictionary where the keys     are character strings, and the values can be any of the supported types in the mdssvc protocol. Due to a     lack of type checking in callers of the dalloc_value_for_key() function, which returns the object     associated with a key, a caller may trigger a crash in talloc_get_size() when talloc detects that the     passed-in pointer is not a valid talloc pointer. With an RPC worker process shared among multiple client     connections, a malicious client or attacker can trigger a process crash in a shared RPC mdssvc worker     process, affecting all other clients this worker serves. (CVE-2023-34967)

  - 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. (CVE-2023-4091)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
182899	SUSE SLES12: ctdb / libsamba-policy-devel / libsamba-policy-python3-devel / etc (SUSE-SU-2023:4040-1)	Nessus	SuSE Local Security Checks	2023/10/11	2026/6/26	medium
184412	Amazon Linux 2023 : libnetapi, libnetapi-devel, libsmbclient (ALAS2023-2023-416)	Nessus	Amazon Linux Local Security Checks	2023/11/4	2026/1/21	critical
182941	Debian DSA-5525-1 : samba - security update	Nessus	Debian Local Security Checks	2023/10/11	2026/1/21	critical
183272	Ubuntu 23.10 : Samba vulnerabilities (USN-6425-3)	Nessus	Ubuntu Local Security Checks	2023/10/18	2026/1/21	medium
186057	RHEL 9 : samba (RHSA-2023:7371)	Nessus	Red Hat Local Security Checks	2023/11/21	2026/1/21	critical
186194	RHEL 8 : samba (RHSA-2023:7467)	Nessus	Red Hat Local Security Checks	2023/11/22	2026/1/21	critical
197263	EulerOS Virtualization 3.0.6.6 : samba (EulerOS-SA-2024-1665)	Nessus	Huawei Local Security Checks	2024/5/17	2026/1/21	medium

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