CVE-2020-28196: High severity IBM Cloud Pak for Security (CP4S) vulnerability

Published Nov 6, 2020
·
Updated

A flaw was found in krb5. MIT Kerberos 5 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1encode.c support for BER indefinite lengths lacks a recursion limit.

Other sources

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/asn1encode.c support for BER indefinite lengths lacks a recursion limit.

MIT Kerberos 5 (aka krb5) is vulnerable to a denial of service, caused by an unbounded recursion flaw in lib/krb5/asn.1/asn1encode.c. By sending a specially-crafted ASN.1-encoded Kerberos message, a remote attacker could exploit this vulnerability to cause a denial of service condition.

— IBM

Affected Software

21 affected componentsFixes available
redhat/krb5<0:1.18.2-8.el8
0:1.18.2-8.el8
redhat/redhat-virtualization-host<0:4.4.6-20210527.3.el8_4
0:4.4.6-20210527.3.el8_4
debian/krb5
1.17-3+deb10u41.17-3+deb10u51.18.3-6+deb11u41.18.3-6+deb11u31.20.1-2+deb12u11.20.1-4
redhat/krb5<1.17.2
1.17.2
redhat/krb5<1.18.3
1.18.3
IBM Cloud Pak for Security (CP4S)<=1.7.2.0
IBM Cloud Pak for Security (CP4S)<=1.7.1.0
IBM Cloud Pak for Security (CP4S)<=1.7.0.0
MIT Kerberos 5<1.17.2
MIT Kerberos 5>=1.18.0<1.18.3
Fedoraproject Fedora=31
NetApp Active Iq Unified Manager Vmware Vsphere
NetApp Active Iq Unified Manager Windows
NetApp Cloud Backup
NetApp OnCommand Insight
NetApp OnCommand Workflow Automation
NetApp Snapcenter
Oracle Communications Cloud Native Core Policy=1.14.0
Oracle Communications Offline Mediation Controller=12.0.0.3.0
Oracle Communications Pricing Design Center=12.0.0.3.0
Oracle MySQL Server<=8.0.23

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/krb5 to a version that resolves this vulnerability.

    Fixed in 0:1.18.2-8.el8
  2. Upgrade

    Upgrade redhat/redhat-virtualization-host to a version that resolves this vulnerability.

    Fixed in 0:4.4.6-20210527.3.el8_4
  3. Upgrade

    Upgrade debian/krb5 to a version that resolves this vulnerability.

    Fixed in 1.17-3+deb10u4Fixed in 1.17-3+deb10u5Fixed in 1.18.3-6+deb11u4Fixed in 1.18.3-6+deb11u3Fixed in 1.20.1-2+deb12u1Fixed in 1.20.1-4
  4. Upgrade

    Upgrade redhat/krb5 to a version that resolves this vulnerability.

    Fixed in 1.17.2
  5. Upgrade

    Upgrade redhat/krb5 to a version that resolves this vulnerability.

    Fixed in 1.18.3

Event History

Nov 6, 2020
CVE Published
12:00 AM
CVE Published
via MITRE·07:07 AM
Data Sourced
via MITRE·07:07 AM
Description
Data Sourced
via NVD·08:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
Nov 24, 2020
Data Sourced
via Red Hat·10:55 AM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203