A flaw was found in Keycloak. This issue occurs because sensitive runtime values, such as passwords, may be captured during the Keycloak build process and embedded as default values in bytecode, leading to unintended information disclosure. In Keycloak 26, sensitive data specified directly in environment variables during the build process is also stored as default values, making it accessible during runtime. Indirect usage of environment variables for SPI options and Quarkus properties is also vulnerable due to unconditional expansion by PropertyMapper logic, capturing sensitive data as default values in all Keycloak versions up to 26.0.2.
The CVSS score for this vulnerability is 5.9, which classifies it as medium severity. This score indicates that while the potential impact is significant, the complexity of exploitation is high, requiring no privileges and no user interaction.
Risk to organizations includes potential exposure of sensitive credentials, which can lead to unauthorized access and data breaches. Organizations should address this vulnerability in their priority patch cycle to mitigate any risks associated with exposed sensitive data.
Currently, there are no known exploits or proof of concept code available for this vulnerability, and it has not been marked as actively exploited. However, the potential for information disclosure remains a concern.
Organizations should prioritize patching immediately.
Vulnerability Details
A flaw was found in Keycloak. This issue occurs because sensitive runtime values, such as passwords, may be captured during the Keycloak build process and embedded as default values in bytecode, leading to unintended information disclosure. In Keycloak 26, sensitive data specified directly in environment variables during the build process is also stored as default values, making it accessible during runtime. Indirect usage of environment variables for SPI options and Quarkus properties is also vulnerable due to unconditional expansion by PropertyMapper logic, capturing sensitive data as default values in all Keycloak versions up to 26.0.2.
The CVSS score for this vulnerability is 5.9, which classifies it as medium severity. This score indicates that while the potential impact is significant, the complexity of exploitation is high, requiring no privileges and no user interaction.
Affected versions of Keycloak include all versions prior to 26.0.2. The vulnerability is categorized under CWE-798, which relates to the exposure of sensitive information through improper handling of sensitive data.
Technical Analysis
The root cause of this vulnerability stems from how Keycloak processes sensitive runtime values during its build phase. These values can inadvertently be embedded in the bytecode, increasing the risk of exposure at runtime.
The attack vector is classified as network-based, with high complexity due to the requirement for specific conditions to be met in the environment configuration. No privileges are required, and user interaction is not necessary for exploitation.
The confidentiality impact of this vulnerability is high, as it may lead to the disclosure of sensitive data. Integrity and availability impacts are deemed negligible.
Risk & Impact Analysis
The risk to organizations includes the potential for exposure of sensitive credentials during the runtime of Keycloak. This could lead to unauthorized access to sensitive systems and data breaches, making it imperative for organizations to address this vulnerability.
With a CVSS score of 5.9, this vulnerability poses a medium risk. Organizations should assess their deployment of Keycloak and prioritize remediation based on their risk tolerance and the criticality of the data processed.
Given the potential for information disclosure, it is important for organizations to address this vulnerability in their patch cycle, ensuring that configurations do not inadvertently expose sensitive data.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch.
Mitigation & Remediation
Organizations should apply the necessary patches as soon as they are available. For those unable to patch immediately, alternative configurations should be considered to limit the exposure of sensitive data.
To ensure the security of applications, organizations may also benefit from conducting regular security assessments. For more information, organizations can refer to our application security assessment services.
Detection Guidance
Monitoring for unusual behavior in Keycloak instances and reviewing logs for unexpected runtime values can help detect potential issues. Organizations should also implement alerts for any unauthorized access attempts.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability lies in its potential to expose sensitive data, which organizations must proactively guard against. This incident highlights the importance of secure coding practices and the need for continuous security testing.
Security teams should be aware of the trends represented by vulnerabilities like this, emphasizing the necessity for effective risk management strategies. Organizations can enhance their security posture by implementing penetration testing to uncover similar vulnerabilities.
Ultimately, the key takeaway from this vulnerability is the need for vigilance and proactive security measures to prevent exposure of sensitive information.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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