CVE-2020-28196

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Summary

CVECVE-2020-28196
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-11-06 08:15:13 UTC
Updated2026-10-14 10:17:34 UTC
DescriptionMIT 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-674 | n/a | CWE-674 CWE-674 Uncontrolled Recursion

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1ADPDECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Mit Kerberos 5 All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
Oracle Critical Patch Update Advisory - April 2022 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
Add recursion limit for ASN.1 indefinite lengths · krb5/krb5@57415dd · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
Oracle Critical Patch Update Advisory - July 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
[SECURITY] Fedora 33 Update: krb5-1.18.2-29.fc33 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e69... af854a3a-2127-422b-91ae-364da2661108 lists.apache.org
Oracle Critical Patch Update Advisory - April 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
[SECURITY] Fedora 32 Update: krb5-1.18.2-29.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
MIT Kerberos 5: Denial of service (GLSA 202011-17) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] [DLA 2437-1] krb5 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Debian -- Security Information -- DSA-4795-1 krb5 af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
[SECURITY] Fedora 31 Update: krb5-1.17-47.fc31 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
April 2021 MySQL Vulnerabilities in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450... af854a3a-2127-422b-91ae-364da2661108 lists.apache.org
CVE-2020-28196 MIT Kerberos 5 Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[SECURITY] Fedora 31 Update: krb5-1.17-47.fc31 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 32 Update: krb5-1.18.2-29.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 33 Update: krb5-1.18.2-29.fc33 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
Pony Mail! MITRE lists.apache.org
Pony Mail! MITRE lists.apache.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159190 Oracle Enterprise Linux Security Update for krb5 (ELSA-2021-1593)
  • 159271 Oracle Enterprise Linux Security Update for krb5 (ELSA-2021-9294)
  • 20221 Oracle MySQL April 2021 Critical Patch Update (CPUAPR2021)
  • 239334 Red Hat Update for krb5 (RHSA-2021:1593)
  • 296085 Oracle Solaris 11.3 Support Repository Update (SRU) 36.30.0 Missing (CPUOCT2022)
  • 354065 Amazon Linux Security Advisory for krb5 : ALAS2-2022-1845
  • 500275 Alpine Linux Security Update for krb5
  • 504040 Alpine Linux Security Update for krb5
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670186 EulerOS Security Update for krb5 (EulerOS-SA-2021-1685)
  • 690151 Free Berkeley Software Distribution (FreeBSD) Security Update for mysql (56ba4513-a1be-11eb-9072-d4c9ef517024)
  • 750550 OpenSUSE Security Update for krb5 (openSUSE-SU-2020:2062-1)
  • 750560 OpenSUSE Security Update for krb5 (openSUSE-SU-2020:2037-1)
  • 900398 Common Base Linux Mariner (CBL-Mariner) Security Update for krb5 (5993)
  • 940317 AlmaLinux Security Update for krb5 (ALSA-2021:1593)
  • 960675 Rocky Linux Security Update for krb5 (RLSA-2021:1593)

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