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Uncontrolled Recursion Affecting krb5-libs package, versions <0:1.15.1-37.amzn2.2.3

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-AMZN2-KRB5LIBS-3042666
  • published 12 Oct 2022
  • disclosed 6 Nov 2020
Report a new vulnerability Found a mistake?

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 Amazon-Linux:2 krb5-libs to version 0:1.15.1-37.amzn2.2.3 or higher.
This issue was patched in ALAS2-2022-1845.

NVD Description

Note: Versions mentioned in the description apply only to the upstream krb5-libs package and not the krb5-libs package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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