An issue was discovered in MIT Kerberos 5 (aka krb5) through 1.16. The pre-defined function "strlen" is getting a "NULL" string as a parameter value in plugins/kdb/ldap/libkdb_ldap/ldap_principal2.c in the Key Distribution Center (KDC), which allows remote authenticated users to cause a denial of service (NULL pointer dereference) via a modified kadmin client.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-5710 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 6.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss EWS 2 | krb5 | Will not fix |
| Red Hat JBoss EAP 6 | krb5 | Will not fix |
| Red Hat JBoss Core Services 1 | krb5 | Will not fix |
| Red Hat Enterprise Linux 7 | krb5 | Will not fix |
| Red Hat Enterprise Linux 6 | krb5 | Will not fix |
| Red Hat Enterprise Linux 5 | krb5 | Will not fix |
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