Published: 23/11/2017 Updated: 26/01/2021

CVSS v2 Base Score: 7.5 | Impact Score: 6.4 | Exploitability Score: 10

CVSS v3 Base Score: 9.8 | Impact Score: 5.9 | Exploitability Score: 3.9

VMScore: 668

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

plugins/preauth/pkinit/pkinit_crypto_openssl.c in MIT Kerberos 5 (aka krb5) up to and including 1.15.2 mishandles Distinguished Name (DN) fields, which allows remote malicious users 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.

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mit kerberos 5

Debian Bug report logs - #871698 krb5: CVE-2017-15088: Buffer overflow in get_matching_data() Package: krb5-pkinit; Maintainer for krb5-pkinit is Sam Hartman <hartmans@debianorg>; Source for krb5-pkinit is src:krb5 (PTS, buildd, popcon) Reported by: kpp <kraynopp@kmru> Date: Thu, 10 Aug 2017 18:33:01 UTC Severity: ...

A stack based buffer overflow was found in the get_matching_data() function, when reading the principal's certificate during pkinit preauthentication If the Certifcate Authority's subject line is sufficiently long, an attacker able to have a specially crafted certificate signed could crash the authentication process, such as kinit, or, possibly, r ...

plugins/preauth/pkinit/pkinit_crypto_opensslc in MIT Kerberos 5 (aka krb5) through 1152 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 X509 data, related to the get_matching_data and X509_NAM ...

CWE-119 https://github.com/krb5/krb5/pull/707 https://github.com/krb5/krb5/commit/fbb687db1088ddd894d975996e5f6a4252b9a2b4 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://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871698 https://nvd.nist.gov https://access.redhat.com/security/cve/cve-2017-15088

CVE-2017-15088

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