CVE-2017-15088

Name: CVE-2017-15088
Creator: NVD / NIST
Published: 2017-11-23T17:29:00.353+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 8.37%

Last modified Jun 17, 2026

CVE-2017-15088 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 8.37% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

8.37%

94.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mit	Kerberos 5	<= 1.15.2

References

http://www.securityfocus.com/bid/101594Third Party Advisory, VDB Entry
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1504045Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/707Patch, Third Party Advisory
http://www.securityfocus.com/bid/101594Third Party Advisory, VDB Entry
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1504045Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4Issue Tracking, Patch, Third Party Advisory
https://github.com/krb5/krb5/pull/707Patch, Third Party Advisory

Timeline

Published: Nov 23, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-15088?

How severe is CVE-2017-15088?

CVE-2017-15088 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 8.37% probability of exploitation in the next 30 days.

How do I fix CVE-2017-15088?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-15088?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST