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CVE-2020-28196

Published: Nov 6, 2020Updated: Dec 3, 2025 Sources: CVE List NVD BDU csafCWE-674
NVD MITRE
7.5CVSSHIGH
EPSS Score
4.4%
Top 10.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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 Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-674

Affected Products

kerberos 5mit
On-prem
Operating Systems
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
active iq unified managernetappHardware Firmware
cloud backupnetappHardware Firmware
oncommand insightnetappHardware Firmware
mitoss-projectUSOperating Systemsaka mit krb5, mit kerberos
fedoraprojectoss-projectUSOperating Systemsaka fedora project
netappcommercialUSHardware Firmware
and 23 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/krb5/krb5/commit/57415dda6cf04e73ffc3723be518eddfae599bfd
github.com
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org
and 38 more references View all →

Timeline

Published
Nov 6, 2020
Last Updated
Dec 3, 2025

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