CVE-2020-28196

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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

4.4% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-25)

CWE

CWE-674

Published

2020-11-06

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

Affected

• fedoraproject:fedora
• mit:kerberos_5
• netapp:active_iq_unified_manager
• netapp:cloud_backup
• netapp:oncommand_insight
• netapp:oncommand_workflow_automation
• netapp:snapcenter
• oracle:communications_cloud_native_core_policy
• oracle:communications_offline_mediation_controller
• oracle:communications_pricing_design_center
• oracle:mysql_server

References

• https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd
• https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
• https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
• https://lists.debian.org/debian-lts-announce/2020/11/msg00011.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45KKOZQWIIIW5C45PJVGQ32AXBSYNBE7/

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