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Overview

org.keycloak:keycloak-authz-client is a client API for Keycloak Authz.

Affected versions of this package are vulnerable to Exposure of Sensitive Information Through Environmental Variables through user-configurable URLs.

Exploiting this vulnerability is possible with the configuration of backchannel logout URLs or admin URLs, when including placeholders like ${env.VARNAME} or ${PROPNAME}, which are replaced with actual values during URL processing. An attacker can access sensitive server environment variables and system properties.

Remediation

Upgrade org.keycloak:keycloak-authz-client to version 26.0.4 or higher.

References

• GitHub Commit
• GitHub Issue

Overview

org.keycloak:keycloak-common is an Open Source Identity and Access Management For Modern Applications and Services.

Affected versions of this package are vulnerable to Exposure of Sensitive Information Through Environmental Variables through user-configurable URLs.

Exploiting this vulnerability is possible with the configuration of backchannel logout URLs or admin URLs, when including placeholders like ${env.VARNAME} or ${PROPNAME}, which are replaced with actual values during URL processing. An attacker can access sensitive server environment variables and system properties.

Remediation

Upgrade org.keycloak:keycloak-common to version 26.0.8 or higher.

References

• GitHub Commit
• GitHub Issue

Overview

org.keycloak:keycloak-core is an open source identity and access management solution.

Affected versions of this package are vulnerable to Exposure of Sensitive Information Through Environmental Variables through user-configurable URLs.

Exploiting this vulnerability is possible with the configuration of backchannel logout URLs or admin URLs, when including placeholders like ${env.VARNAME} or ${PROPNAME}, which are replaced with actual values during URL processing. An attacker can access sensitive server environment variables and system properties.

Remediation

Upgrade org.keycloak:keycloak-core to version 26.0.8 or higher.

References

• GitHub Commit
• GitHub Issue

Overview

org.keycloak:keycloak-core is an open source identity and access management solution.

Affected versions of this package are vulnerable to Use of a Key Past its Expiration Date due to the extended validation period of OTP codes. An attacker can gain unauthorized access by using expired OTP codes that should no longer be valid.

Remediation

Upgrade org.keycloak:keycloak-core to version 24.0.7, 25.0.4 or higher.

References

• GitHub Advisory

Overview

org.keycloak:keycloak-common is an Open Source Identity and Access Management For Modern Applications and Services.

Affected versions of this package are vulnerable to HTTP Request Smuggling due to improper handling of proxy headers resulting in costly DNS resolution operations. An attacker could tie up IO threads and potentially cause a denial of service by exploiting these operations.

Notes:

1. This is only exploitable if the attacker has access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.

2. For versions 26.x, this is only exploitable if the realm must have SslRequired=EXTERNAL (the default), HTTP must be enabled, the instance must not be using a full hostname URL, access must come from behind a proxy (assuming the proxy overwrites the X-Forwarded-For header), and trusted proxies must not be set or must incorrectly trust the client from which the request is originating.

Details

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

• High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

• Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

Remediation

Upgrade org.keycloak:keycloak-common to version 26.0.6 or higher.

References

• GitHub Commit
• GitHub Issue

Dual license: EPL-1.0, LGPL-2.1

Dual license: EPL-1.0, LGPL-2.1