CVE-2017-15088: Mit Kerberos 5

Critical severity, CVSS 9.8. EPSS: 8.3% chance of exploitation in the next 30 days.

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.

Affected products

• Mit Kerberos 5: up to and including 1.15.2

Published 2017-11-23. Last modified 2026-06-17.