The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos     database to cause a denial of service (NULL pointer dereference) or bypass a DN container check by     supplying tagged data that is internal to the database module. (CVE-2018-5729)

Note that Nessus relies on the presence of the package as reported by the vendor.

krb5 的更新现在可用于 Red Hat Enterprise Linux 7。Red Hat 产品安全团队将此更新评级为具有低等安全影响。可从“参考”部分中的 CVE 链接获取通用漏洞评分系统 (CVSS) 基本分数，其针对每个漏洞给出了详细的严重性等级。Kerberos 是一种网络认证系统，该系统可通过消除在网络上发送未加密密码的非安全行为提升网络的安全性。它允许客户端和服务器使用受信任的第三方（即 Kerberos 密钥分发中心 KDC）对彼此进行身份验证。安全修复：* krb5：通过提供特制数据，导致 kadmind 内的空取消引用或 DN 容器检查绕过 (CVE-2018-5729) * krb5：通过提供特制数据，发现 DN 容器检查绕过 (CVE-2018-5730) 有关此安全问题的详细信息，包括其影响、CVSS 分数和其他相关信息，请参阅列于“参考”部分的 CVE 页面。其他更改：如需有关此版本的详细变更信息，请参阅可从“参考”部分链接的 Red Hat Enterprise Linux 7.6 版本说明。

安全修复：

  - krb5：通过提供特制数据，在 kadmind 或 DN 容器中存在空取消引用 (CVE-2018-5729)

  - krb5：通过提供特制数据的 DN 容器检查绕过 (CVE-2018-5730)

MIT krb5 1.6 或更新版本允许拥有权限可将主体添加至 LDAP Kerberos 数据库的经验证 kadmin 避开 DN 容器检查，方法是同时提供 ‘linkdn’ 和 ‘containerdn’ 数据库参数，或提供一个 DN 字符串，该字符串是容器 DN 字符串的左扩展，但在容器 DN 内没有层次结构。(CVE-2018-5730) MIT krb5 1.6 或更新版本允许拥有权限可将主体添加至 LDAP Kerberos 数据库的经验证 kadmin，通过提供数据库模块内部的标记数据，造成拒绝服务（空指针取消引用）或绕过 DN 容器检查。(CVE-2018-5729)

根据安装的 krb5 程序包版本，远程主机上安装的 EulerOS Virtualization 会受到下列漏洞影响：- MIT krb5 1.6 或更新版本允许拥有权限可将主体添加至 LDAP Kerberos 数据库的经验证 kadmin，通过提供数据库模块内部的标记数据，造成拒绝服务（空指针取消引用）或绕过 DN 容器检查。(CVE-2018-5729) - MIT krb5 1.6 或更新版本允许拥有权限可将主体添加至 LDAP Kerberos 数据库的经验证 kadmin 避开 DN 容器检查，方法是同时提供“linkdn”和“containerdn”数据库参数，或提供一个 DN 字符串，该字符串是容器 DN 字符串的左扩展，但在容器 DN 内没有层次结构。(CVE-2018-5730) 请注意，Tenable Network Security 已直接从 EulerOS 安全公告中提取上述描述块。Tenable 已尝试在不引入其他问题的情况下尽可能进行了自动整理和排版。

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - MIT krb5 1.6 或更新版本允许拥有权限将主体添加至 LDAP Kerberos 数据库且经过身份验证的 kadmin，通过提供数据库模块内部的标记数据，造成拒绝服务（空指针取消引用）或绕过 DN 容器检查。(CVE-2018-5729)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

An update of the krb5 package has been released.

Fix CVE-2018-5729, CVE-2018-5730.

These are low-impact, requiring administrator access to exploit.

----

Fix leak in previous version.

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Always read config snippets in alphabetical order per-directory.

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

According to the versions of the krb5 packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - null dereference in kadmind or DN container check     bypass by supplying special crafted data     (CVE-2018-5729)

  - DN container check bypass by supplying special crafted     data (CVE-2018-5730)

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.

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to circumvent a DN containership check by supplying both a 'linkdn' and 'containerdn' database argument, or by supplying a DN string which is a left extension of a container DN string but is not hierarchically within the container DN. (CVE-2018-5730)

MIT krb5 1.6 or later allows an authenticated kadmin with permission to add principals to an LDAP Kerberos database to cause a denial of service (NULL pointer dereference) or bypass a DN container check by supplying tagged data that is internal to the database module.
(CVE-2018-5729)

According to the versions of the krb5 packages installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - MIT krb5 1.6 or later allows an authenticated kadmin     with permission to add principals to an LDAP Kerberos     database to circumvent a DN containership check by     supplying both a 'linkdn' and 'containerdn' database     argument, or by supplying a DN string which is a left     extension of a container DN string but is not     hierarchically within the container DN.(CVE-2018-5730)

  - MIT krb5 1.6 or later allows an authenticated kadmin     with permission to add principals to an LDAP Kerberos     database to cause a denial of service (NULL pointer     dereference) or bypass a DN container check by     supplying tagged data that is internal to the database     module.(CVE-2018-5729)

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.

krb5, a MIT Kerberos implementation, had several flaws in LDAP DN checking, which could be used to circumvent a DN containership check by supplying special parameters to some calls.

Further an attacker could crash the KDC by making S4U2Self requests.

For Debian 8 'Jessie', these problems have been fixed in version 1.12.1+dfsg-19+deb8u5.

We recommend that you upgrade your krb5 packages.

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
221904	Linux Distros Unpatched Vulnerability : CVE-2018-5729	Nessus	Misc.	2025/3/4	2025/3/4	medium
118523	RHEL 7 : krb5 (RHSA-2018:3071)	Nessus	Red Hat Local Security Checks	2018/10/31	2024/11/5	medium
119188	Scientific Linux 安全更新：SL7.x x86_64 上的 krb5 (20181030)	Nessus	Scientific Linux Local Security Checks	2018/11/27	2024/7/18	medium
119784	Amazon Linux 2 : krb5 (ALAS-2018-1129)	Nessus	Amazon Linux Local Security Checks	2018/12/20	2024/7/15	medium
123870	EulerOS Virtualization 2.5.3：krb5 (EulerOS-SA-2019-1184)	Nessus	Huawei Local Security Checks	2019/4/9	2024/6/4	medium
221904	Linux Distros 未修补的漏洞: CVE-2018-5729	Nessus	Misc.	2025/3/4	2025/3/4	medium
203167	Photon OS 4.0: Krb5 PHSA-2021-4.0-0102	Nessus	PhotonOS Local Security Checks	2024/7/23	2024/7/23	medium
107108	Fedora 26 : krb5 (2018-f97cb1c9b0)	Nessus	Fedora Local Security Checks	2018/3/2	2021/1/6	medium
119914	EulerOS 2.0 SP2 : krb5 (EulerOS-SA-2018-1425)	Nessus	Huawei Local Security Checks	2018/12/28	2024/7/12	medium
121361	Amazon Linux AMI : krb5 (ALAS-2018-1129)	Nessus	Amazon Linux Local Security Checks	2019/1/25	2024/6/26	medium
124886	EulerOS Virtualization for ARM 64 3.0.1.0 : krb5 (EulerOS-SA-2019-1383)	Nessus	Huawei Local Security Checks	2019/5/14	2024/5/23	medium
126183	Photon OS 3.0: Krb5 PHSA-2019-3.0-0020	Nessus	PhotonOS Local Security Checks	2019/6/24	2024/7/24	medium
121399	Debian DLA-1643-1 : krb5 security update	Nessus	Debian Local Security Checks	2019/1/28	2021/1/11	medium

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