Description
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.
References (5)
Core 5
Core References
Issue Tracking, Patch, Third Party Advisory x_refsource_confirm
https://bugzilla.redhat.com/show_bug.cgi?id=1504045
Issue Tracking, Third Party Advisory x_refsource_confirm
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698
Issue Tracking, Patch, Third Party Advisory x_refsource_confirm
https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4
Patch, Third Party Advisory x_refsource_confirm
https://github.com/krb5/krb5/pull/707
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/101594
Scores
CVSS v3
9.8
EPSS
0.0370
EPSS Percentile
88.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-119
CWE-121
Status
published
Products (2)
mit/kerberos_5
< 1.15.2
n/a/krb5 1.5
krb5 1.5
Published
Nov 23, 2017
Tracked Since
Feb 18, 2026