Vulnerability CVE-2017-15088
Published: 2017-11-23

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.

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
MIT -> Kerberos 

 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
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