SB2017102520 - Fedora 27 update for krb5

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Main Vulnerability Database SB2017102520

SB2017102520 - Fedora 27 update for krb5

Published: October 25, 2017 Updated: April 24, 2025

Security Bulletin ID SB2017102520
Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Buffer overflow (CVE-ID: CVE-2017-15088)

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

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

Install update from vendor's website.

References