Out-of-Bounds Affecting krb5 package, versions <1.15.2-2


Severity

low

    Threat Intelligence

    EPSS
    2.06% (90th percentile)

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  • Snyk ID SNYK-DEBIAN10-KRB5-395792
  • published 23 Nov 2017
  • disclosed 23 Nov 2017

How to fix?

Upgrade Debian:10 krb5 to version 1.15.2-2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5 package and not the krb5 package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

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.

CVSS Scores

version 3.1
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Snyk

9.8 low
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
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NVD

9.8 critical
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Red Hat

7.1 high