CVE-2017-15088: Buffer Overflow
First published: Thu Aug 10 2017(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/krb5 | <1.16 | 1.16 |
| Kerberos 5 (libkrb5) | <=1.15.2 |
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Reference Links
- https://github.com/krb5/krb5/pull/707
- https://bugzilla.redhat.com/show_bug.cgi?id=1504045
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698
- http://www.securityfocus.com/bid/101594
- https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1506622
- https://access.redhat.com/security/updates/classification/
Frequently Asked Questions
What is the severity of CVE-2017-15088?
CVE-2017-15088 is classified as a high severity vulnerability due to its potential for arbitrary code execution and denial of service.
How do I fix CVE-2017-15088?
To mitigate CVE-2017-15088, upgrade your MIT Kerberos 5 installation to version 1.16 or higher.
What type of attacks can exploit CVE-2017-15088?
CVE-2017-15088 can be exploited by remote attackers through mishandled Distinguished Name fields in untrusted X.509 certificates.
Which versions of MIT Kerberos 5 are affected by CVE-2017-15088?
CVE-2017-15088 affects all versions of MIT Kerberos 5 up to and including 1.15.2.
Can CVE-2017-15088 lead to application crashes?
Yes, CVE-2017-15088 can cause application crashes due to a buffer overflow condition.
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