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NULL Pointer Dereference Affecting krb5 package, versions <1.14.3+dfsg-1

Severity

0.0
medium
0
10

    Threat Intelligence

    EPSS
    4.89% (93rd percentile)

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  • Snyk ID SNYK-DEBIAN10-KRB5-395783
  • 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:10 krb5 to version 1.14.3+dfsg-1 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.

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

CVSS Scores

version 3.1
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Snyk

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

6.5 medium
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Red Hat

5.3 medium