CVE-2023-3128 is a critical vulnerability affecting Grafana that results from improper validation of Azure AD accounts based on the email claim. Specifically, the profile email field on Azure AD is not unique and can be easily modified, which enables account takeover and authentication bypass when Azure AD OAuth is configured with a multi-tenant application.
The CVSS score for this vulnerability is 9.4, indicating a critical severity level. The risk to organizations includes potential unauthorized access to sensitive information and systems, making it vital for organizations using Grafana to address this vulnerability promptly.
Currently, this vulnerability is known to have an exploit, requiring organizations to prioritize remediation. Organizations should implement necessary patches immediately to mitigate risks associated with this vulnerability.
Given the critical nature of this vulnerability, organizations should act urgently to prevent exploitation that could lead to significant security incidents.
Vulnerability Details
The vulnerability allows attackers to exploit the flawed validation of Azure AD accounts. As mentioned, the email field is not unique, which means that an attacker can modify their email claim, leading to unauthorized access.
The vulnerability has a CVSS score of 9.4, reflecting high severity. It impacts confidentiality, integrity, and availability, with a confidentiality impact classified as high and an integrity impact also classified as high.
The affected product is Grafana, and this vulnerability was publicly disclosed on June 22, 2023.
Technical Analysis
The root cause of this vulnerability stems from Grafana’s reliance on Azure AD accounts based on email claims without ensuring their uniqueness. This lack of validation allows attackers to impersonate legitimate users.
The attack vector is network-based, with low complexity and no privileges required to exploit it. User interaction is not necessary for the attack to succeed. Given the high stakes involved, organizations must be aware of the potential confidentiality and integrity impacts.
Risk & Impact Analysis
The real-world deployment risk associated with this vulnerability is significant. Attackers may leverage this vulnerability to gain unauthorized access to Grafana instances, potentially exposing sensitive data and operational capabilities.
The urgency for organizations to respond is critical, given the CVSS score of 9.4. Immediate action is necessary as the blast radius could extend to all user accounts configured with Azure AD OAuth.
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The affected versions of Grafana are those starting from 6.7.0 up to, but not including, 8.5.27, as well as versions 9.2.0 to 9.2.20, 9.3.0 to 9.3.16, 9.4.0 to 9.4.13, and 9.5.0 to 9.5.4.
Mitigation & Remediation
Organizations should prioritize patching immediately. The recommended version to upgrade to is Grafana versions 8.5.27 or higher, or any version from 9.2.20 and above.
In addition to applying patches, organizations may also consider implementing configuration hardening and monitoring for any unusual authentication behaviors to further mitigate risks.
For more information, organizations can refer to the guidance on penetration testing to validate the effectiveness of their remediation measures.
Detection Guidance
Organizations should monitor logs for indicators of unauthorized access attempts, including failed login attempts and unusual patterns in user activity. Behavioral anomalies in account usage should be flagged for further investigation.
Network signatures related to authentication requests should also be scrutinized to ensure that no malicious attempts are being made to exploit this vulnerability.
AppSecure Threat Intelligence Insight
CVE-2023-3128 highlights the critical importance of proper validation in authentication mechanisms. This vulnerability represents a pattern where improper handling of user claims can lead to severe security breaches.
Security teams should take this as a learning opportunity to strengthen their authentication processes, ensuring that all claims are validated appropriately.
For further reading on enhancing security measures, organizations can explore our resources on API security testing and cloud penetration testing methodologies to better prepare against similar vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)