What’s Vulnerable › Vulnerabilities

CVE-2017-15088

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-23 · updated 2026-06-17
• Weakness: CWE-121

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.

Affected products

• MIT Kerberos 5: through 1.15.2

References

• http://www.securityfocus.com/bid/101594
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698
• https://bugzilla.redhat.com/show_bug.cgi?id=1504045
• https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4
• https://github.com/krb5/krb5/pull/707
• http://www.securityfocus.com/bid/101594
• https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698
• https://bugzilla.redhat.com/show_bug.cgi?id=1504045
• https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4
• https://github.com/krb5/krb5/pull/707

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