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Uncontrolled Recursion Affecting krb5 package, versions <1.13.2+dfsg-5ubuntu2.2

medium

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.52% (77th percentile)
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NVD
7.5 high
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-UBUNTU1604-KRB5-1038548
  • published 10 Nov 2020
  • disclosed 6 Nov 2020
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Introduced: 6 Nov 2020

CVE-2020-28196 Open this link in a new tab
CWE-674 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 krb5 to version 1.13.2+dfsg-5ubuntu2.2 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 Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.

References