The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2771 advisory.

    Several vulnerabilities were fixed in MIT Kerberos, a system for authenticating users and services on a     network. CVE-2018-5729 CVE-2018-5730 Fix flaws in LDAP DN checking. CVE-2018-20217 Ignore password     attributes for S4U2Self requests. CVE-2021-37750 Fix KDC null deref on TGS inner body null server. For     Debian 9 stretch, these problems have been fixed in version 1.15-1+deb9u3. We recommend that you upgrade     your krb5 packages. For the detailed security status of krb5 please refer to its security tracker page at:
    https://security-tracker.debian.org/tracker/krb5 Further information about Debian LTS security advisories,     how to apply these updates to your system and frequently asked questions can be found at:
    https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 MAIN 6.06, has krb5 packages installed that are affected by multiple vulnerabilities:

  - plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT Kerberos 5 (aka krb5) through 1.15.2 mishandles     Distinguished Name (DN) fields, which allows remote attackers to execute arbitrary code or cause a denial     of service (buffer overflow and application crash) in situations involving untrusted X.509 data, related     to the get_matching_data and X509_NAME_oneline_ex functions. NOTE: this has security relevance only in use     cases outside of the MIT Kerberos distribution, e.g., the use of get_matching_data in KDC certauth plugin     code that is specific to Red Hat. (CVE-2017-15088)

  - The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT     Kerberos 5 (aka krb5) 1.7 through 1.9 frees an invalid pointer, which allows remote attackers to execute     arbitrary code or cause a denial of service (daemon crash) via a crafted request that triggers an error     condition. (CVE-2011-0285)

  - schpw.c in the kpasswd service in kadmind in MIT Kerberos 5 (aka krb5) before 1.11.3 does not properly     validate UDP packets before sending responses, which allows remote attackers to cause a denial of service     (CPU and bandwidth consumption) via a forged packet that triggers a communication loop, as demonstrated by     krb_pingpong.nasl, a related issue to CVE-1999-0103. (CVE-2002-2443)

  - The (1) ftpd and (2) ksu programs in (a) MIT Kerberos 5 (krb5) up to 1.5, and 1.4.x before 1.4.4, and (b)     Heimdal 0.7.2 and earlier, do not check return codes for setuid calls, which might allow local users to     gain privileges by causing setuid to fail to drop privileges. NOTE: as of 20060808, it is not known     whether an exploitable attack scenario exists for these issues. (CVE-2006-3084)

  - The RPC library in Kerberos 5 1.4 through 1.4.4, and 1.5 through 1.5.1, as used in Kerberos administration     daemon (kadmind) and other products that use this library, calls an uninitialized function pointer in     freed memory, which allows remote attackers to cause a denial of service (crash) and possibly execute     arbitrary code via unspecified vectors. (CVE-2006-6143)

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 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2018:3071 advisory.

    Kerberos is a network authentication system, which can improve the security of your network by eliminating     the insecure practice of sending passwords over the network in unencrypted form. It allows clients and     servers to authenticate to each other with the help of a trusted third party, the Kerberos key     distribution center (KDC).

    Security Fix(es):

    * krb5: null dereference in kadmind or DN container check bypass by supplying special crafted data     (CVE-2018-5729)

    * krb5: DN container check bypass by supplying special crafted data (CVE-2018-5730)

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

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes     linked from 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.

Security Fix(es) :

  - krb5: null dereference in kadmind or DN container check     bypass by supplying special crafted data (CVE-2018-5729)

  - krb5: DN container check bypass by supplying special     crafted data (CVE-2018-5730)

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 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 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.i1/4^CVE-2018-5729i1/4%0

  - 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.i1/4^CVE-2018-5730i1/4%0

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.

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

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

----

Fix leak in previous version.

----

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 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.

An update of the krb5 package has been released.

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)

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
153808	Debian DLA-2771-1 : krb5 - LTS security update	Nessus	Debian Local Security Checks	2021/10/1	2025/1/24	medium
266225	NewStart CGSL MAIN 6.06 : krb5 Multiple Vulnerabilities (NS-SA-2025-0215)	Nessus	NewStart CGSL Local Security Checks	2025/9/30	2025/10/1	critical
118523	RHEL 7 : krb5 (RHSA-2018:3071)	Nessus	Red Hat Local Security Checks	2018/10/31	2024/11/5	medium
119188	Scientific Linux Security Update : krb5 on SL7.x x86_64 (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
106908	Fedora 27 : krb5 (2018-391a1f3e61)	Nessus	Fedora Local Security Checks	2018/2/21	2021/1/6	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
203167	Photon OS 4.0: Krb5 PHSA-2021-4.0-0102	Nessus	PhotonOS Local Security Checks	2024/7/23	2024/7/23	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
121399	Debian DLA-1643-1 : krb5 security update	Nessus	Debian Local Security Checks	2019/1/28	2021/1/11	medium
107108	Fedora 26 : krb5 (2018-f97cb1c9b0)	Nessus	Fedora Local Security Checks	2018/3/2	2025/10/27	medium

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