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NULL Pointer Dereference Affecting krb5 package, versions <1.12.1+dfsg-19+deb8u3

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 4.89% (93rd percentile)
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NVD
6.5 medium
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Red Hat
5.3 medium

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  • Snyk ID SNYK-DEBIAN8-KRB5-395781
  • published 1 Aug 2016
  • disclosed 1 Aug 2016
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Introduced: 1 Aug 2016

CVE-2016-3120 Open this link in a new tab
CWE-476 Open this link in a new tab

How to fix?

Upgrade Debian:8 krb5 to version 1.12.1+dfsg-19+deb8u3 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:8 relevant fixed versions and status.

The validate_as_request function in kdc_util.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) before 1.13.6 and 1.4.x before 1.14.3, when restrict_anonymous_to_tgt is enabled, uses an incorrect client data structure, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via an S4U2Self request.

References