RHSA-2021:3534MediumCVSS 7.5

Red Hat Security Advisory: Red Hat Single Sign-On 7.4.9 security update

Published
September 14, 2021
Last Modified
August 4, 2026

🔗 CVE IDs covered (10)

📋 Description

CVE-2020-28491 — jackson-dataformat-cbor: Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception CVE-2020-35509 — keycloak: X509 Direct Grant Auth does not verify certificate timestamp validity CVE-2021-3513 — keycloak: Brute force attack is possible even after the account lockout CVE-2021-3597 — undertow: HTTP2SourceChannel fails to write final frame under some circumstances may lead to DoS CVE-2021-3632 — keycloak: Anyone can register a new device when there is no device registered for passwordless login CVE-2021-3637 — keycloak-model-infinispan: authenticationSessions map in RootAuthenticationSessionEntity grows boundlessly could lead to a DoS attack CVE-2021-3644 — wildfly-core: Invalid Sensitivity Classification of Vault Expression CVE-2021-3690 — undertow: buffer leak on incoming websocket PONG message may lead to DoS CVE-2021-28170 — jakarta-el: ELParserTokenManager enables invalid EL expressions to be evaluate CVE-2021-29425 — apache-commons-io: Limited path traversal in Apache Commons IO 2.2 to 2.6

🎯 Affected products1

  • Red Hat Single Sign-On 7.4.9

✅ Remediation

Before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. The References section of this erratum contains a download link (you must log in to download the update).

🔗 References (16)