Alerts This Week
Warning Icon 1 764
Alerts This Week
Warning Icon 1 764

Red Hat: RHSA-2021-3527-01 Moderate: Keycloak DoS Attack Mitigated

red hat
Calendar Grey September 14, 2021
Dist Redhat Esm H88
Red Hat announces a security update for Single Sign-On version 7.4.9 for RHEL 6, resolving various vulnerabilities and improving overall security posture.
New Red Hat Single Sign-On 7.4.9 packages are now available for Red Hat Enterprise Linux 6

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Summary

Red Hat Single Sign-On 7.4 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications.
This release of Red Hat Single Sign-On 7.4.9 serves as a replacement for Red Hat Single Sign-On 7.4.8, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References.
Security Fix(es):
* jackson-dataformat-cbor: Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception (CVE-2020-28491)
* keycloak: Brute force attack is possible even after the account lockout (CVE-2021-3513)
* keycloak: Anyone can register a new device when there is no device registered for passwordless login (CVE-2021-3632)
* keycloak-model-infinispan: authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly could lead to a DoS attack (CVE-2021-3637)
* keycloak: X509 Direct Grant Auth does not verify certificate timestamp validity (CVE-2020-35509)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat bug fix DoS authentication Keycloak

References

https://access.redhat.com/security/cve/CVE-2020-28491 https://access.redhat.com/security/cve/CVE-2020-35509 https://access.redhat.com/security/cve/CVE-2021-3513 https://access.redhat.com/security/cve/CVE-2021-3632 https://access.redhat.com/security/cve/CVE-2021-3637 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_single_sign-on/7.4/html/release_notes/index

Package List

Red Hat Single Sign-On 7.4 for RHEL 6 Server:
Source: rh-sso7-keycloak-9.0.15-1.redhat_00002.1.el6sso.src.rpm
noarch: rh-sso7-keycloak-9.0.15-1.redhat_00002.1.el6sso.noarch.rpm rh-sso7-keycloak-server-9.0.15-1.redhat_00002.1.el6sso.noarch.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:3527-01
Product: Red Hat Single Sign-On
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3527
Issue date: 2021-09-14

Topic

New Red Hat Single Sign-On 7.4.9 packages are now available for Red HatEnterprise Linux 6.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory security update Red Hat bug fix DoS authentication Keycloak

Relevant Releases Architectures

Red Hat Single Sign-On 7.4 for RHEL 6 Server - noarch

Bugs Fixed

1912427 - CVE-2020-35509 keycloak: X509 Direct Grant Auth does not verify certificate timestamp validity

1930423 - CVE-2020-28491 jackson-dataformat-cbor: Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception

1953439 - CVE-2021-3513 keycloak: Brute force attack is possible even after the account lockout

1978196 - CVE-2021-3632 keycloak: Anyone can register a new device when there is no device registered for passwordless login

1979638 - CVE-2021-3637 keycloak-model-infinispan: authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly could lead to a DoS attack

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here