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Amazon Linux AMI: CVE-2018-20217: Security patch for krb5 (ALAS-2020-1374)

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Amazon Linux AMI: CVE-2018-20217: Security patch for krb5 (ALAS-2020-1374)

Severity
4
CVSS
(AV:N/AC:M/Au:S/C:N/I:N/A:P)
Published
12/26/2018
Created
06/05/2020
Added
06/04/2020
Modified
10/14/2022

Description

A Reachable Assertion issue was discovered in the KDC in MIT Kerberos 5 (aka krb5) before 1.17. If an attacker can obtain a krbtgt ticket using an older encryption type (single-DES, triple-DES, or RC4), the attacker can crash the KDC by making an S4U2Self request.

Solution(s)

  • amazon-linux-upgrade-krb5

References

  • ALAS-2020-1374
  • CVE-2018-20217

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