The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:1647 advisory.

  - samba: Missing handle permissions check in SMB1/2/3 ChangeNotify (CVE-2020-14318)

  - samba: Unprivileged user can crash winbind (CVE-2020-14323)

  - samba: Netlogon elevation of privilege vulnerability (Zerologon) (CVE-2020-1472)

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

遠端 Scientific Linux 7 主機上安裝的套件受到 SLSA-2020: 5439-1 公告中提及的多個弱點影響。

  - samba：Netlogon 權限提升弱點 (Zerologon) (CVE-2020-1472)

  - samba：SMB1/2/3 ChangeNotify 中缺失處理權限檢查 (CVE-2020-14318)

  - samba：無特權的使用者可以損毀 winbind (CVE-2020-14323)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼。

遠端主機上安裝的測試產品版本比測試版本舊。因此，會受到 ALAS2-2021-1585 公告中所提及的多個弱點影響。

  -在 samba 處理檔案和目錄權限的方式中發現一個瑕疵。經驗證的使用者可利用此瑕疵，取得攻擊者本無法取得的特定檔案和目錄資訊存取權。(CVE-2020-14318)

  - 在 Samba 的 Winbind 服務 4.11.15 之前版本、4.12.9 之前版本以及 4.13.1 之前版本中發現了一個 Null 指標解除參照瑕疵。本機使用者可利用這個瑕疵造成 winbind 服務損毀，進而引發拒絕服務。(CVE-2020-14323)

  - 當攻擊者使用 Netlogon 遠端通訊協定 (MS-NRPC) 建立有弱點的 Netlogon 安全通道連線至網域控制器時，存在權限提高弱點，即「Netlogon 權限提高弱點」。(CVE-2020-1472)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼。

遠端 CentOS Linux 7 主機上安裝的套件受到 RHSA-2020:5439 公告中提及的多個弱點影響。

  - 在 samba 處理檔案和目錄權限的方式中發現一個瑕疵。經驗證的使用者可利用此瑕疵，取得攻擊者本無法取得的特定檔案和目錄資訊存取權。(CVE-2020-14318)

  - 在 Samba 的 Winbind 服務 4.11.15 之前版本、4.12.9 之前版本以及 4.13.1 之前版本中發現了一個 Null 指標解除參照瑕疵。本機使用者可利用這個瑕疵造成 winbind 服務損毀，進而引發拒絕服務。(CVE-2020-14323)

  - 當攻擊者使用 Netlogon 遠端通訊協定 (MS-NRPC) 與網域控制器建立有弱點的 Netlogon 安全通道連線時，存在特權提高弱點。成功利用該弱點的攻擊者可在網路裝置上執行特別建構的應用程式。若要惡意利用此弱點，未經驗證的攻擊者必須使用 MS-NRPC 連線至網域控制器，以取得網域管理員存取權。Microsoft 正在分階段部署 (兩部分) 解決此弱點。這些更新透過修改 Netlogon 處理 Netlogon 安全通道使用量的方式解決此弱點。如需有關如何管理此弱點所需變更的準則，以及有關分階段部署的詳細資訊，請參閱如何管理 Netlogon 安全通道連線中與 CVE-2020-1472 相關的變更 (更新於 2020 年 9 月 28 日)。當 Windows 更新的第二階段於 2021 年第 1 季發佈時，將會透過此安全性弱點的修訂版通知客戶。如果您希望在這些更新發佈時收到通知，我們建議您註冊安全性通知郵件程式，以便在此公告的內容變更時收到警示。
    請參閱 Microsoft 技術安全性通知。 (CVE-2020-1472)

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

遠端 Redhat Enterprise Linux 8 主機上安裝的套件受到 RHSA-2021:1647 公告中提及的多個弱點影響。

    Samba 是伺服器訊息區 (SMB) 通訊協定與相關 Common Internet File System (CIFS) 通訊協定的開放原始碼實作，可讓 PC 相容電腦共用檔案、印表機和多種資訊。

    下列套件已升級至更新的上游版本samba (4.13.3)。 (BZ#1878109)

    安全性修正：

    * sambaNetlogon 權限提升弱點 (Zerologon) (CVE-2020-1472)

    * sambaSMB1/2/3 ChangeNotify 中缺少處理權限檢查 (CVE-2020-14318)

    * samba無權限的使用者可使 winbind 損毀 (CVE-2020-14323)

    如需安全性問題的詳細資料，包括影響、CVSS 分數、致謝及其他相關資訊，請參閱〈參照〉一節列出的 CVE 頁面。

    其他變更：

    如需有關此發行版本的詳細變更資訊，請參閱可從「參考資料」一節連結的 Red Hat Enterprise Linux 8.4 版本資訊。

Tenable 已直接從 Red Hat Enterprise Linux 安全公告擷取前置描述區塊。

請注意，Nessus 並未測試這些問題，而是僅依據應用程式自我報告的版本號碼作出判斷。

執行 CORE 5.05 / MAIN 5.05 版的遠端 NewStart CGSL 主機上安裝的 samba 套件受到多個弱點影響：

  - 在 samba 4.9.18 之前的 4.9.x 版、4.10.12 之前的 4.10.x 版以及 4.11.5 之前的 4.11.x 版中存在一個問題，如果以記錄層級= 3 (或以上) 進行設定，則會在字元轉換失敗後列印從用戶端取得的字串。此類字串可在 NTLMSSP 驗證交換期間提供。
    特別是在 Samba AD DC 中，這可能導致長效處理程序 (例如 RPC 伺服器) 終止。(如果是檔案伺服器，目標 smbd 最有可能以 process-per-client 的方式運作，因此當機情況不會造成任何危害)。(CVE-2019-14907)

  - 在 samba 處理檔案和目錄權限的方式中發現一個瑕疵。經驗證的使用者可利用此瑕疵，取得攻擊者本無法取得的特定檔案和目錄資訊存取權。(CVE-2020-14318)

  - 在 Samba 的 Winbind 服務 4.11.15 之前版本、4.12.9 之前版本以及 4.13.1 之前版本中發現了一個 Null 指標解除參照瑕疵。本機使用者可利用這個瑕疵造成 winbind 服務損毀，進而引發拒絕服務。(CVE-2020-14323)

  - 當攻擊者使用 Netlogon 遠端通訊協定 (MS-NRPC) 建立有弱點的 Netlogon 安全通道連線至網域控制器時，存在權限提高弱點，即「Netlogon 權限提高弱點」。(CVE-2020-1472)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼。

This update for samba fixes the following issues :

Update to samba 4.11.14

CVE-2020-14383: An authenticated user can crash the DCE/RPC DNS with easily crafted records (bsc#1177613).

CVE-2020-14323: Unprivileged user can crash winbind (bsc#1173994).

CVE-2020-14318: Missing permissions check in SMB1/2/3 ChangeNotify (bsc#1173902).

lib/util: Do not install /usr/bin/test_util

smbd: don't log success as error

idmap_ad does not deal properly with a RFC4511 section 4.4.1 response;

winbind: Fix a memleak

idmap_ad: Pass tldap debug messages on to DEBUG()

lib/replace: Move lib/replace/closefrom.c from ROKEN_HOSTCC_SOURCE to REPLACE_HOSTCC_SOURCE

ctdb disable/enable can fail due to race condition

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

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2021:0077 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2019-10197:
    A flaw was found in samba versions 4.9.x up to 4.9.13, samba 4.10.x up to 4.10.8 and samba 4.11.x up to     4.11.0rc3, when certain parameters were set in the samba configuration file. An unauthenticated attacker     could use this flaw to escape the shared directory and access the contents of directories outside the     share.

    CVE-2019-10218:
    A flaw was found in the samba client, all samba versions before samba 4.11.2, 4.10.10 and 4.9.15, where a     malicious server can supply a pathname to the client with separators. This could allow the client to     access files and folders outside of the SMB network pathnames. An attacker could use this vulnerability to     create files outside of the current working directory using the privileges of the client user.

    CVE-2019-14907:
    All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where     if it is set with log level = 3 (or above) then the string obtained from the client, after a failed     character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange.
    In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to     terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a     crash there is harmless).

    CVE-2019-3880:
    A flaw was found in the way samba implemented an RPC endpoint emulating the Windows registry service API.
    An unprivileged attacker could use this flaw to create a new registry hive file anywhere they have unix     permissions which could lead to creation of a new file in the Samba share. Versions before 4.8.11, 4.9.6     and 4.10.2 are vulnerable.

    CVE-2020-14318:
    A flaw was found in the way samba handled file and directory permissions. An authenticated user could use     this flaw to gain access to certain file and directory information which otherwise would be unavailable to     the attacker.

    CVE-2020-14323:
    A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before     4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of     service.

    CVE-2020-14383:
    A flaw was found in samba's DNS server. An authenticated user could use this flaw to the RPC server to     crash. This RPC server, which also serves protocols other than dnsserver, will be restarted after a short     delay, but it is easy for an authenticated non administrative attacker to crash it again as soon as it     returns. The Samba DNS server itself will continue to operate, but many RPC services will not.

    CVE-2020-1472:
    An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure     channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon     Elevation of Privilege Vulnerability'.

    CVE-2020-25717:
    A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use     this flaw to cause possible privilege escalation.

    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.

    CVE-2021-23192:
    A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large     DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data,     bypassing the signature requirements.

Tenable has extracted the preceding description block directly from the Alibaba Cloud 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 for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - A null pointer dereference flaw was found in samba's     Winbind service in versions before 4.11.15, before     4.12.9 and before 4.13.1. A local user could use this     flaw to crash the winbind service causing denial of     service.(CVE-2020-14323,CVE-2020-14318)

  - An elevation of privilege vulnerability exists when an     attacker establishes a vulnerable Netlogon secure     channel connection to a domain controller, using the     Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon     Elevation of Privilege Vulnerability'.(CVE-2020-1472)

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.

The version of samba installed on the remote host is prior to 4.10.16-9.56. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2021-1469 advisory.

    A flaw was found in the way samba handled file and directory permissions. An authenticated user could use     this flaw to gain access to certain file and directory information which otherwise would be unavailable to     the attacker. (CVE-2020-14318)

    A null pointer dereference flaw was found in Samba's winbind service. This flaw allows a local user to     crash the winbind service, causing a denial of service. The highest threat from this vulnerability is to     system availability. (CVE-2020-14323)

    A flaw was found in the Microsoft Windows Netlogon Remote Protocol (MS-NRPC), where it reuses a known,     static, zero-value initialization vector (IV) in AES-CFB8 mode. This flaw allows an unauthenticated     attacker to impersonate a domain-joined computer, including a domain controller, and possibly obtain     domain administratorprivileges. The highest threat from this vulnerability is to confidentiality,     integrity, as well as system availability. (CVE-2020-1472)

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 NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has samba packages installed that are affected by multiple vulnerabilities:

  - All samba versions 4.9.x before 4.9.18, 4.10.x before 4.10.12 and 4.11.x before 4.11.5 have an issue where     if it is set with log level = 3 (or above) then the string obtained from the client, after a failed     character conversion, is printed. Such strings can be provided during the NTLMSSP authentication exchange.
    In the Samba AD DC in particular, this may cause a long-lived process(such as the RPC server) to     terminate. (In the file server case, the most likely target, smbd, operates as process-per-client and so a     crash there is harmless). (CVE-2019-14907)

  - An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure     channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon     Elevation of Privilege Vulnerability'. (CVE-2020-1472)

  - A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before     4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of     service. (CVE-2020-14323)

  - A flaw was found in the way samba handled file and directory permissions. An authenticated user could use     this flaw to gain access to certain file and directory information which otherwise would be unavailable to     the attacker. (CVE-2020-14318)

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

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2021-1647 advisory.

    - resolves: #1891688 - Fix CVE-2020-14323
    - resolves: #1892633 - Fix CVE-2020-14318
    - resolves: #1892639 - Fix CVE-2020-14383
    - resolves: #1879835 - Fix CVE-2020-1472

Tenable has extracted the preceding description block directly from the Oracle 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 :

  - A flaw was found in the way samba handled file and     directory permissions. An authenticated user could use     this flaw to gain access to certain file and directory     information which otherwise would be unavailable to the     attacker.(CVE-2020-14318)

  - A null pointer dereference flaw was found in samba's     Winbind service in versions before 4.11.15, before     4.12.9 and before 4.13.1. A local user could use this     flaw to crash the winbind service causing denial of     service.(CVE-2020-14323)

  - A flaw was found in samba's DNS server. An     authenticated user could use this flaw to the RPC     server to crash. This RPC server, which also serves     protocols other than dnsserver, will be restarted after     a short delay, but it is easy for an authenticated non     administrative attacker to crash it again as soon as it     returns. The Samba DNS server itself will continue to     operate, but many RPC services will     not.(CVE-2020-14383)

  - A NULL pointer dereference, or possible use-after-free     flaw was found in Samba AD LDAP server in versions     before 4.10.17, before 4.11.11 and before 4.12.4.
    Although some versions of Samba shipped with Red Hat     Enterprise Linux do not support Samba in AD mode, the     affected code is shipped with the libldb package. This     flaw allows an authenticated user to possibly trigger a     use-after-free or NULL pointer dereference. The highest     threat from this vulnerability is to system     availability. (CVE-2020-10730)

  - A flaw was found in all Samba versions before 4.10.17,     before 4.11.11 and before 4.12.4 in the way it     processed NetBios over TCP/IP. This flaw allows a     remote attacker could to cause the Samba server to     consume excessive CPU use, resulting in a denial of     service. This highest threat from this vulnerability is     to system availability. (CVE-2020-10745)

  - A use-after-free flaw was found in all samba LDAP     server versions before 4.10.17, before 4.11.11, before     4.12.4 used in a AC DC configuration. A Samba LDAP user     could use this flaw to crash samba. (CVE-2020-10760)

  - A flaw was found in the AD DC NBT server in all Samba     versions before 4.10.17, before 4.11.11 and before     4.12.4. A samba user could send an empty UDP packet to     cause the samba server to crash. (CVE-2020-14303)

  - An elevation of privilege vulnerability exists when an     attacker establishes a vulnerable Netlogon secure     channel connection to a domain controller, using the     Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon     Elevation of Privilege Vulnerability'. (CVE-2020-1472)

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.

The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2021:1647 advisory.

  - An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure     channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon     Elevation of Privilege Vulnerability'. (CVE-2020-1472)

  - A flaw was found in the way samba handled file and directory permissions. An authenticated user could use     this flaw to gain access to certain file and directory information which otherwise would be unavailable to     the attacker. (CVE-2020-14318)

  - A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before     4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of     service. (CVE-2020-14323)

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
149752	CentOS 8 : samba (CESA-2021:1647)	Nessus	CentOS Local Security Checks	2021/5/19	2025/12/17	medium
144296	Scientific Linux 安全性更新：SL7.x i686/x86_64 上的 samba (2020:5439)	Nessus	Scientific Linux Local Security Checks	2020/12/15	2025/12/17	medium
144800	Amazon Linux 2：ctdb (ALAS-2021-1585)	Nessus	Amazon Linux Local Security Checks	2021/1/7	2025/12/17	medium
144973	CentOS 7：samba (RHSA-2020:5439)	Nessus	CentOS Local Security Checks	2021/1/14	2025/12/17	medium
149679	RHEL 8：samba (RHSA-2021:1647)	Nessus	Red Hat Local Security Checks	2021/5/19	2025/12/17	medium
154485	NewStart CGSL CORE 5.05 / MAIN 5.05：samba 多個弱點 (NS-SA-2021-0167)	Nessus	NewStart CGSL Local Security Checks	2021/10/27	2025/12/17	medium
143848	SUSE SLED15 / SLES15 Security Update : samba (SUSE-SU-2020:3081-1)	Nessus	SuSE Local Security Checks	2020/12/9	2021/1/13	medium
236653	Alibaba Cloud Linux 3 : 0077: samba (ALINUX3-SA-2021:0077)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/12/17	critical
144739	EulerOS Virtualization for ARM 64 3.0.2.0 : samba (EulerOS-SA-2021-1050)	Nessus	Huawei Local Security Checks	2021/1/5	2025/12/17	medium
144992	Amazon Linux AMI : samba (ALAS-2021-1469)	Nessus	Amazon Linux Local Security Checks	2021/1/14	2025/12/17	medium
147360	NewStart CGSL CORE 5.04 / MAIN 5.04 : samba Multiple Vulnerabilities (NS-SA-2021-0024)	Nessus	NewStart CGSL Local Security Checks	2021/3/10	2025/12/17	medium
149965	Oracle Linux 8 : samba (ELSA-2021-1647)	Nessus	Oracle Linux Local Security Checks	2021/5/26	2025/12/17	medium
151396	EulerOS Virtualization 3.0.2.2 : samba (EulerOS-SA-2021-2168)	Nessus	Huawei Local Security Checks	2021/7/6	2025/12/17	medium
157490	AlmaLinux 8 : samba (ALSA-2021:1647)	Nessus	Alma Linux Local Security Checks	2022/2/9	2025/12/17	medium

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