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CVE-2017-15088

9.8 · CRITICAL

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 caus…

Published Nov 23, 2017CWE-121EPSS 8.30%

Overview

CVE-2017-15088 is a critical-severity vulnerability. It was published on November 23, 2017 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/101594Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=871698Refbugzilla.redhat.com/show_bug.cgi?id=1504045GitHubgithub.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4GitHubgithub.com/krb5/krb5/pull/707Refwww.securityfocus.com/bid/101594Refbugs.debian.org/cgi-bin/bugreport.cgi?bug=871698Refbugzilla.redhat.com/show_bug.cgi?id=1504045GitHubgithub.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4GitHubgithub.com/krb5/krb5/pull/707

How CyberStrike helps

Frequently asked questions

What is CVE-2017-15088?

CVE-2017-15088 is a critical-severity vulnerability. It was published on November 23, 2017 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2017-15088?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-15088?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-15088?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-15088 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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