CVE-2017-15088

moderate-risk
Published 2017-11-23

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.

Do I need to act?

~
3.7% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Mit

References (10)

Third Party Advisory http://www.securityfocus.com/bid/101594
Issue Tracking https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1504045
Issue Tracking https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4
Patch https://github.com/krb5/krb5/pull/707
Third Party Advisory http://www.securityfocus.com/bid/101594
Issue Tracking https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=1504045
Issue Tracking https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4
Patch https://github.com/krb5/krb5/pull/707
44
/ 100
moderate-risk
Severity 32/34 · Critical
Exploitability 7/34 · Low
Exposure 5/34 · Minimal