The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6238-1 advisory.

    It was discovered that Samba incorrectly handled Winbind NTLM authentication responses. An attacker could     possibly use this issue to cause Samba to crash, resulting in a denial of service. (CVE-2022-2127)

    Andreas Schneider discovered that Samba incorrectly enforced SMB2 packet signing. A remote attacker could     possibly use this issue to obtain or modify sensitive information. This issue only affected Ubuntu 23.04.
    (CVE-2023-3347)

    Florent Saudel and Arnaud Gatignolof discovered that Samba incorrectly handled certain Spotlight requests.
    A remote attacker could possibly use this issue to cause Samba to consume resources, leading to a denial     of service. (CVE-2023-34966, CVE-2023-34967)

    Ralph Boehme and Stefan Metzmacher discovered that Samba incorrectly handled paths returned by Spotlight     requests. A remote attacker could possibly use this issue to obtain sensitive information.
    (CVE-2023-34968)

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 Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-76c06c8576 advisory.

    Update to version 4.18.5, Security fixes for CVE-2022-2127, CVE-2023-3347, CVE-2023-34966, CVE-2023-34967     and CVE-2023-34968

Tenable has extracted the preceding description block directly from the Fedora 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-5477 advisory.

  - An out-of-bounds read vulnerability was found in Samba due to insufficient length checks in     winbindd_pam_auth_crap.c. When performing NTLM authentication, the client replies to cryptographic     challenges back to the server. These replies have variable lengths, and Winbind fails to check the lan     manager response length. When Winbind is used for NTLM authentication, a maliciously crafted request can     trigger an out-of-bounds read in Winbind, possibly resulting in a crash. (CVE-2022-2127)

  - A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not     enforced if an admin configured server signing = required or for SMB2 connections to Domain Controllers     where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-     the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and     server, affecting the integrity of the data. (CVE-2023-3347)

  - 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 path disclosure vulnerability was found in Samba. As part of the Spotlight protocol, Samba discloses the     server-side absolute path of shares, files, and directories in the results for search queries. This flaw     allows a malicious client or an attacker with a targeted RPC request to view the information that is part     of the disclosed path. (CVE-2023-34968)

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

The remote host is affected by the vulnerability described in GLSA-202402-28 (Samba: Multiple Vulnerabilities)

  - An information leak vulnerability was discovered in Samba's LDAP server. Due to missing access control     checks, an authenticated but unprivileged attacker could discover the names and preserved attributes of     deleted objects in the LDAP store. (CVE-2018-14628)

  - An out-of-bounds read vulnerability was found in Samba due to insufficient length checks in     winbindd_pam_auth_crap.c. When performing NTLM authentication, the client replies to cryptographic     challenges back to the server. These replies have variable lengths, and Winbind fails to check the lan     manager response length. When Winbind is used for NTLM authentication, a maliciously crafted request can     trigger an out-of-bounds read in Winbind, possibly resulting in a crash. (CVE-2022-2127)

  - A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not     enforced if an admin configured server signing = required or for SMB2 connections to Domain Controllers     where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-     the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and     server, affecting the integrity of the data. (CVE-2023-3347)

  - 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)

  - 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 path disclosure vulnerability was found in Samba. As part of the Spotlight protocol, Samba discloses the     server-side absolute path of shares, files, and directories in the results for search queries. This flaw     allows a malicious client or an attacker with a targeted RPC request to view the information that is part     of the disclosed path. (CVE-2023-34968)

  - 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 CentOS Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the samba-4.18.5-100.el9 build changelog.

  - An out-of-bounds read vulnerability was found in Samba due to insufficient length checks in     winbindd_pam_auth_crap.c. When performing NTLM authentication, the client replies to cryptographic     challenges back to the server. These replies have variable lengths, and Winbind fails to check the lan     manager response length. When Winbind is used for NTLM authentication, a maliciously crafted request can     trigger an out-of-bounds read in Winbind, possibly resulting in a crash. (CVE-2022-2127)

  - A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not     enforced if an admin configured server signing = required or for SMB2 connections to Domain Controllers     where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-     the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and     server, affecting the integrity of the data. (CVE-2023-3347)

  - 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 path disclosure vulnerability was found in Samba. As part of the Spotlight protocol, Samba discloses the     server-side absolute path of shares, files, and directories in the results for search queries. This flaw     allows a malicious client or an attacker with a targeted RPC request to view the information that is part     of the disclosed path. (CVE-2023-34968)

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

The remote NewStart CGSL host, running version MAIN 7.02, has samba packages installed that are affected by multiple vulnerabilities:

  - 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)

  - An information leak vulnerability was discovered in Samba's LDAP server. Due to missing access control     checks, an authenticated but unprivileged attacker could discover the names and preserved attributes of     deleted objects in the LDAP store. (CVE-2018-14628)

  - An out-of-bounds read vulnerability was found in Samba due to insufficient length checks in     winbindd_pam_auth_crap.c. When performing NTLM authentication, the client replies to cryptographic     challenges back to the server. These replies have variable lengths, and Winbind fails to check the lan     manager response length. When Winbind is used for NTLM authentication, a maliciously crafted request can     trigger an out-of-bounds read in Winbind, possibly resulting in a crash. (CVE-2022-2127)

  - A vulnerability was found in Samba's SMB2 packet signing mechanism. The SMB2 packet signing is not     enforced if an admin configured server signing = required or for SMB2 connections to Domain Controllers     where SMB2 packet signing is mandatory. This flaw allows an attacker to perform attacks, such as a man-in-     the-middle attack, by intercepting the network traffic and modifying the SMB2 messages between client and     server, affecting the integrity of the data. (CVE-2023-3347)

  - 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)

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

远程主机受到 GLSA-202402-28 中所述漏洞的影响（Samba：多个漏洞）

  - 在 Samba 的 LDAP 服务器中发现信息泄漏漏洞。由于缺少访问控制检查，经过身份验证的非特权攻击者可在 LDAP 存储中发现已删除对象的名称及保留属性。(CVE-2018-14628)

  - 在 Samba 中发现越界读取漏洞，这是因为 winbindd_pam_auth_crap.c 中存在长度检查不足问题。执行 NTLM 认证时，客户端会将加密质询回复给服务器。这些回复具有可变长度，而 Winbind 未检查 lan 管理器的响应长度。将 Winbind 用于 NTLM 认证时，通过恶意构建的请求可在 Winbind 中触发越界读取，进而可能导致程序崩溃。(CVE-2022-2127)

  - 在 Samba 的 SMB2 数据包签名机制中发现漏洞。如果管理员配置了“服务器签名 = 必需”，或必须进行 SMB2 数据包签名才能将 SMB2 连接到域控制器，则不强制执行 SMB2 数据包签名。此缺陷允许攻击者通过拦截网络流量并修改客户端与服务器之间的 SMB2 消息来执行攻击（例如中间人攻击），从而影响数据的完整性。(CVE-2023-3347)

  - 在处理连接到私有目录中的 Unix 域套接字的客户端管道名称时，Samba 中发现了路径遍历漏洞。Samba 通常用于将 SMB 客户端连接到远程过程调用 (RPC) 服务，例如 Samba 按需启动的 SAMR LSA 或 SPOOLSS。
    然而，由于传入客户端管道名称的清理不充分，允许客户端发送包含 Unix 目录遍历字符 (../) 的管道名称。这可能会导致 SMB 客户端以 root 身份连接到私有目录之外的 Unix 域套接字。如果攻击者或客户端设法使用现有的 Unix 域套接字发送解析到外部服务的管道名称，则可能会导致对服务的未经授权的访问以及随之而来的不良事件，包括妥协或服务崩溃。(CVE-2023-3961)

  - Samba 中发现了一个漏洞，该漏洞允许 SMB 客户端截断文件，即使在使用 acl_xattr 配置 Samba VFS 模块 acl_xattr:ignore system acls = yes 时，即使具有只读权限也是如此。SMB 协议允许打开客户端请求只读访问的文件，但如果客户端指定单独的 OVERWRITE 创建配置，则会将已打开的文件隐式截断为 0 字节。该问题出现在绕过内核文件系统权限检查、仅依赖 Samba 权限的配置中。(CVE-2023-4091)

  - Samba 的 DirSync 控制实现中发现了一个设计缺陷，该缺陷将 Active Directory 中的密码和机密暴露给特权用户和只读型域控制器 (RODC)。此缺陷允许 RODC 和拥有 GET_CHANGES 权限的用户访问所有属性，包括敏感机密和密码。即使在默认设置中，RODC DC 帐户（只应复制一些密码）也可以访问所有域机密，包括重要的 krbtgt，从而有效消除 RODC / DC 的区别。此外，该漏洞无法考虑错误情况（打开失败），例如内存不足的情况，即使在低特权攻击者的影响下，也可能授予对秘密属性的访问权限。(CVE-2023-4154)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现无限循环漏洞。解析由客户端发送的 Spotlight mdssvc RPC 数据包时，核心解组函数 sl_unpack_loop() 未验证类数组结构中包含元素计数的网络数据包中的字段。通过传递 0 作为计数值，受到攻击的函数将在死循环中运行，占用全部 CPU。此缺陷允许攻击者发出畸形 RPC 请求，从而触发无限循环，导致拒绝服务条件。(CVE-2023-34966)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现类型混淆漏洞。解析 Spotlight mdssvc RPC 数据包时，一个编码的数据结构是键值样式字典，其中的键是字符串，值可以是 mdssvc 协议中任何受支持的类型。由于 dalloc_value_for_key() 函数的调用方（返回与密钥关联的对象）缺少类型检查，因此当 talloc 检测到传入的指针并非有效的 talloc 指针时，调用方可在 talloc_get_size() 中触发崩溃。由于在多个客户端连接之间共享 RPC 工作进程，恶意客户端或攻击者可在共享的 RPC mdssvc 工作进程中触发进程崩溃，从而影响此工作线程服务的所有其他客户端。(CVE-2023-34967)

  - 在 Samba 中发现路径泄露漏洞。作为 Spotlight 协议的一部分，Samba 会在搜索查询的结果中泄露共享、文件和目录的服务器端绝对路径。此缺陷允许恶意客户端或攻击者通过目标 RPC 请求查看属于遭泄露路径的信息。(CVE-2023-34968)

  - 在 Samba 的 rpcecho 开发服务器中发现一个漏洞，该服务器是用于测试 Samba 的 DCE/RPC 堆栈元素的非 Windows RPC 服务器。此漏洞源自从可无限期被封锁的 RPC 功能。出现此问题的原因是 rpcecho 服务在主 RPC 任务中仅通过一个工作程序运行，从而导致对 rpcecho 服务器的调用受到指定时间的封锁，进而造成服务中断。此次服务中断是在特定情况下由 dcesrv_echo_TestSleep() 函数中的 sleep() 调用触发的。经过身份验证的用户或攻击者均可利用此漏洞调用 rpcecho 服务器，请求其在特定的持续时间内封锁调用，从而有效地中断大多数服务并在 AD DC 上造成完全拒绝服务的情形。DoS 会影响所有其他服务，因为 rpcecho 是在主 RPC 任务中运行。(CVE-2023-42669)

  - 在 Samba 中发现一个缺陷。它很容易受到一个漏洞的影响，可以启动多个不兼容的 RPC 侦听器，从而导致 AD DC 服务中断。当 Samba 的 RPC 服务器遇到高负载或无响应时，用于非 AD DC 用途的服务器（例如 NT4 模拟经典 DC）可能会错误启动并竞争相同的 UNIX 域套接字。此问题会导致 AD DC 的部分查询响应，从而导致使用 Active Directory 用户等工具时出现“过程编号超出范围”等问题。此缺陷允许攻击者破坏 AD DC 服务。
    (CVE-2023-42670)

请注意，Nessus 尚未测试这些问题，而是只依靠应用程序自我报告的版本号来判断。

远程 Ubuntu 20.04 LTS / 22.04 LTS / 22.10 / 23.04 主机上安装的程序包受到 USN-6238-1 公告中提及的多个漏洞的影响。

  - 在 Samba 中发现路径泄露漏洞。作为 Spotlight 协议的一部分，Samba 会在搜索查询的结果中泄露共享、文件和目录的服务器端绝对路径。此缺陷允许恶意客户端或攻击者通过目标 RPC 请求查看属于遭泄露路径的信息。(CVE-2023-34968)

  - 在 Samba 中发现越界读取漏洞，这是因为 winbindd_pam_auth_crap.c 中存在长度检查不足问题。执行 NTLM 认证时，客户端会将加密质询回复给服务器。这些回复具有可变长度，而 Winbind 未检查 lan 管理器的响应长度。将 Winbind 用于 NTLM 认证时，通过恶意构建的请求可在 Winbind 中触发越界读取，进而可能导致程序崩溃。(CVE-2022-2127)

  - 在 Samba 的 SMB2 数据包签名机制中发现漏洞。如果管理员配置了“服务器签名 = 必需”，或必须进行 SMB2 数据包签名才能将 SMB2 连接到域控制器，则不强制执行 SMB2 数据包签名。此缺陷允许攻击者通过拦截网络流量并修改客户端与服务器之间的 SMB2 消息来执行攻击（例如中间人攻击），从而影响数据的完整性。(CVE-2023-3347)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现无限循环漏洞。解析由客户端发送的 Spotlight mdssvc RPC 数据包时，核心解组函数 sl_unpack_loop() 未验证类数组结构中包含元素计数的网络数据包中的字段。通过传递 0 作为计数值，受到攻击的函数将在死循环中运行，占用全部 CPU。此缺陷允许攻击者发出畸形 RPC 请求，从而触发无限循环，导致拒绝服务条件。(CVE-2023-34966)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现类型混淆漏洞。解析 Spotlight mdssvc RPC 数据包时，一个编码的数据结构是键值样式字典，其中的键是字符串，值可以是 mdssvc 协议中任何受支持的类型。由于 dalloc_value_for_key() 函数的调用方（返回与密钥关联的对象）缺少类型检查，因此当 talloc 检测到传入的指针并非有效的 talloc 指针时，调用方可在 talloc_get_size() 中触发崩溃。由于在多个客户端连接之间共享 RPC 工作进程，恶意客户端或攻击者可在共享的 RPC mdssvc 工作进程中触发进程崩溃，从而影响此工作线程服务的所有其他客户端。(CVE-2023-34967)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程 Debian 12 主机上安装的多个程序包受到 dsa-5477 公告中提及的多个漏洞影响。

  - 在 Samba 中发现越界读取漏洞，这是因为 winbindd_pam_auth_crap.c 中存在长度检查不足问题。执行 NTLM 认证时，客户端会将加密质询回复给服务器。这些回复具有可变长度，而 Winbind 未检查 lan 管理器的响应长度。将 Winbind 用于 NTLM 认证时，通过恶意构建的请求可在 Winbind 中触发越界读取，进而可能导致程序崩溃。(CVE-2022-2127)

  - 在 Samba 的 SMB2 数据包签名机制中发现漏洞。如果管理员配置了“服务器签名 = 必需”，或必须进行 SMB2 数据包签名才能将 SMB2 连接到域控制器，则不强制执行 SMB2 数据包签名。此缺陷允许攻击者通过拦截网络流量并修改客户端与服务器之间的 SMB2 消息来执行攻击（例如中间人攻击），从而影响数据的完整性。(CVE-2023-3347)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现无限循环漏洞。解析由客户端发送的 Spotlight mdssvc RPC 数据包时，核心解组函数 sl_unpack_loop() 未验证类数组结构中包含元素计数的网络数据包中的字段。通过传递 0 作为计数值，受到攻击的函数将在死循环中运行，占用全部 CPU。此缺陷允许攻击者发出畸形 RPC 请求，从而触发无限循环，导致拒绝服务条件。(CVE-2023-34966)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现类型混淆漏洞。解析 Spotlight mdssvc RPC 数据包时，一个编码的数据结构是键值样式字典，其中的键是字符串，值可以是 mdssvc 协议中任何受支持的类型。由于 dalloc_value_for_key() 函数的调用方（返回与密钥关联的对象）缺少类型检查，因此当 talloc 检测到传入的指针并非有效的 talloc 指针时，调用方可在 talloc_get_size() 中触发崩溃。由于在多个客户端连接之间共享 RPC 工作进程，恶意客户端或攻击者可在共享的 RPC mdssvc 工作进程中触发进程崩溃，从而影响此工作线程服务的所有其他客户端。(CVE-2023-34967)

  - 在 Samba 中发现路径泄露漏洞。作为 Spotlight 协议的一部分，Samba 会在搜索查询的结果中泄露共享、文件和目录的服务器端绝对路径。此缺陷允许恶意客户端或攻击者通过目标 RPC 请求查看属于遭泄露路径的信息。(CVE-2023-34968)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

远程 CentOS Linux 9 主机上安装的多个程序包受到 samba-4.18.5-100.el9 版本变更日志中提及的多个漏洞影响。

  - 在 Samba 中发现越界读取漏洞，这是因为 winbindd_pam_auth_crap.c 中存在长度检查不足问题。执行 NTLM 认证时，客户端会将加密质询回复给服务器。这些回复具有可变长度，而 Winbind 未检查 lan 管理器的响应长度。将 Winbind 用于 NTLM 认证时，通过恶意构建的请求可在 Winbind 中触发越界读取，进而可能导致程序崩溃。(CVE-2022-2127)

  - 在 Samba 的 SMB2 数据包签名机制中发现漏洞。如果管理员配置了“服务器签名 = 必需”，或必须进行 SMB2 数据包签名才能将 SMB2 连接到域控制器，则不强制执行 SMB2 数据包签名。此缺陷允许攻击者通过拦截网络流量并修改客户端与服务器之间的 SMB2 消息来执行攻击（例如中间人攻击），从而影响数据的完整性。(CVE-2023-3347)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现无限循环漏洞。解析由客户端发送的 Spotlight mdssvc RPC 数据包时，核心解组函数 sl_unpack_loop() 未验证类数组结构中包含元素计数的网络数据包中的字段。通过传递 0 作为计数值，受到攻击的函数将在死循环中运行，占用全部 CPU。此缺陷允许攻击者发出畸形 RPC 请求，从而触发无限循环，导致拒绝服务条件。(CVE-2023-34966)

  - 在 Samba 的 Spotlight mdssvc RPC 服务中发现类型混淆漏洞。解析 Spotlight mdssvc RPC 数据包时，一个编码的数据结构是键值样式字典，其中的键是字符串，值可以是 mdssvc 协议中任何受支持的类型。由于 dalloc_value_for_key() 函数的调用方（返回与密钥关联的对象）缺少类型检查，因此当 talloc 检测到传入的指针并非有效的 talloc 指针时，调用方可在 talloc_get_size() 中触发崩溃。由于在多个客户端连接之间共享 RPC 工作进程，恶意客户端或攻击者可在共享的 RPC mdssvc 工作进程中触发进程崩溃，从而影响此工作线程服务的所有其他客户端。(CVE-2023-34967)

  - 在 Samba 中发现路径泄露漏洞。作为 Spotlight 协议的一部分，Samba 会在搜索查询的结果中泄露共享、文件和目录的服务器端绝对路径。此缺陷允许恶意客户端或攻击者通过目标 RPC 请求查看属于遭泄露路径的信息。(CVE-2023-34968)

请注意，Nessus 尚未测试这些问题，而是只依据应用程序自我报告的版本号进行判断。

ID	名前	製品	ファミリー	公開日	更新日	深刻度
178487	Ubuntu 20.04 LTS / 22.04 LTS / 23.04 : Samba vulnerabilities (USN-6238-1)	Nessus	Ubuntu Local Security Checks	2023/7/19	2025/9/3	medium
178729	Fedora 38 : samba (2023-76c06c8576)	Nessus	Fedora Local Security Checks	2023/7/22	2024/11/14	medium
179819	Debian DSA-5477-1 : samba - security update	Nessus	Debian Local Security Checks	2023/8/15	2025/5/9	medium
190761	GLSA-202402-28 : Samba: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	2024/2/20	2024/2/20	critical
191226	CentOS 9 : samba-4.18.5-100.el9	Nessus	CentOS Local Security Checks	2024/2/29	2024/4/26	medium
242780	NewStart CGSL MAIN 7.02 : samba Multiple Vulnerabilities (NS-SA-2025-0133)	Nessus	NewStart CGSL Local Security Checks	2025/7/25	2025/7/25	critical
190761	GLSA-202402-28：Samba：多个漏洞	Nessus	Gentoo Local Security Checks	2024/2/20	2024/2/20	critical
178487	Ubuntu 20.04 LTS/22.04 LTS/23.04：Samba 漏洞 (USN-6238-1)	Nessus	Ubuntu Local Security Checks	2023/7/19	2025/9/3	medium
179819	Debian DSA-5477-1：samba - 安全更新	Nessus	Debian Local Security Checks	2023/8/15	2025/5/9	medium
191226	CentOS 9：samba-4.18.5-100.el9	Nessus	CentOS Local Security Checks	2024/2/29	2024/4/26	medium

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