CVE-2024-4985 is a critical authentication bypass vulnerability identified in GitHub Enterprise Server when utilizing SAML single sign-on authentication with the optional encrypted assertions feature. This vulnerability allows attackers to forge a SAML response, granting them unauthorized access to users with site administrator privileges. Exploitation of this vulnerability enables access to the instance without requiring prior authentication, thus posing significant risks to organizations.
The CVSS score of 10 indicates a critical severity level, meaning organizations are at heightened risk if they do not address this vulnerability promptly. The urgency for defenders to act is underscored by the potential for unauthorized access to sensitive administrative functions within GitHub Enterprise Server.
Organizations utilizing GitHub Enterprise Server versions prior to 3.13.0 are particularly vulnerable, as the issue has been fixed in versions 3.9.15, 3.10.12, 3.11.10, and 3.12.4. Given the nature of this vulnerability, it is essential for affected organizations to prioritize patching immediately.
The vulnerability was reported through the GitHub Bug Bounty program, emphasizing the importance of community involvement in identifying and addressing security flaws.
Vulnerability Details
An authentication bypass vulnerability was present in GitHub Enterprise Server (GHES) when utilizing SAML single sign-on authentication with the optional encrypted assertions feature. This vulnerability allows an attacker to forge a SAML response to provision and/or gain access to a user with site administrator privileges. Exploitation of this vulnerability would allow unauthorized access to the instance without requiring prior authentication.
This vulnerability affects all versions of GitHub Enterprise Server prior to 3.13.0 and was fixed in versions 3.9.15, 3.10.12, 3.11.10, and 3.12.4.
The vulnerability is classified under CWE-303, indicating an access control issue.
Technical Analysis
The root cause of this vulnerability stems from inadequate authentication controls within the SAML single sign-on framework. Specifically, the optional encrypted assertions feature did not sufficiently validate the authenticity of the SAML responses, allowing attackers to craft malicious responses.
The attack vector is classified as NETWORK, indicating that an attacker can exploit this vulnerability remotely without needing physical access to the system. The attack complexity is rated as LOW, meaning that exploiting this vulnerability does not require specialized skills or extensive knowledge of the system.
No privileges are required for the attacker to exploit this vulnerability, and no user interaction is necessary, making it even more dangerous. The impact includes high confidentiality, integrity, and availability implications, highlighting the critical need for immediate remediation.
Risk & Impact Analysis
Organizations using GitHub Enterprise Server are at significant risk due to this vulnerability, as an attacker could gain unauthorized access to administrative functionalities. This could lead to data breaches, loss of sensitive information, and damage to the organization's reputation.
Given the CVSS score of 10, this vulnerability demands immediate attention, and organizations should prioritize patching it in their security management processes. The blast radius of potential exploitation is extensive, as it could impact all users with administrative privileges.
Organizations should implement monitoring measures to detect any unauthorized access attempts and review their SAML configurations to ensure compliance with security best practices. The urgency for remediation is underscored by the potential for significant operational disruption.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
This vulnerability affects all versions of GitHub Enterprise Server prior to 3.13.0. The fixed versions include 3.9.15, 3.10.12, 3.11.10, and 3.12.4.
Mitigation & Remediation
Organizations are advised to upgrade their GitHub Enterprise Server to the latest version to mitigate this vulnerability. Specifically, upgrade to version 3.13.0 or later. If immediate patching is not possible, organizations should implement strict access controls and monitor SAML response validation processes closely.
For further security measures, organizations should consider leveraging penetration testing to assess their security posture and identify potential weaknesses in their configurations.
Detection Guidance
Organizations should monitor logs for unusual access patterns, particularly around SAML authentication events. Additionally, behavioral anomalies in user activities should be closely observed, especially for users with elevated privileges.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2024-4985 highlights the critical nature of SAML authentication mechanisms and the need for robust validation processes. This vulnerability serves as a reminder for security teams to continuously review and strengthen authentication protocols.
Organizations should invest in comprehensive training for development and security teams on secure coding practices and vulnerability management. For detailed methodologies, refer to the penetration testing methodology to enhance their security framework.
As organizations adapt to evolving threats, the insights gained from this vulnerability should inform the development of strategic defenses against similar vulnerabilities in the future.
For further reading on security assessments, organizations are encouraged to explore our vulnerability management program and its implications for overall security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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