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CVE-2020-28196

Published: Nov 6, 2020Updated: Dec 3, 2025 Sources: CVE List NVD BDU csafCWE-674
7.5HIGH
NVD MITRE
EPSS Score
4.4%
Top 9.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

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

netapp
commercial·US
active iq unified manager
Hardware Firmware
cloud backup
Hardware Firmware
oncommand insight
Hardware Firmware
oncommand workflow automation
Hardware Firmware
snapcenter
Hardware Firmware
Oracle Corp.
commercial·USaka oracle
Communications Cloud Native Core PolicyOn-premDatabase
Databases / cache-message-queue
communications offline mediation controllerOn-premWeb App
Databases / data-warehouse-analytics
Communications Pricing Design CenterOn-premWeb App
Communications / messaging-chat
MySQL ServerOn-premDatabase
Databases / relational
Oracle Communications Offline Mediation ControllerOn-premWeb App
Networking Infrastructure / network-management
MIT
oss-project·USaka mit kerberos, mit krb5
kerberos 5On-prem
Operating Systems
KerberosOn-prem
Security Products / pki-crypto
Red Hat Inc.
commercial·USaka red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
Red Hat VirtualizationOn-prem
Operating Systems / linux-distro
fedoraproject
oss-project·USaka fedora project
fedoraOn-premOS
Operating Systems / linux-distro
Canonical Ltd.
commercial·GBaka canonical
UbuntuOn-premOS
Operating Systems / linux-distro
and 12 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2020-28196?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

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 →

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