CVE-2024-47807 in OpenId Connect Authentication Plugin
Summary
by MITRE • 10/02/2024
Jenkins OpenId Connect Authentication Plugin 4.354.v321ce67a_1de8 and earlier does not check the `iss` (Issuer) claim of an ID Token, allowing attackers to subvert the authentication flow, potentially gaining administrator access to Jenkins.
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Analysis
by VulDB Data Team • 10/06/2024
The vulnerability identified as CVE-2024-47807 affects the Jenkins OpenId Connect Authentication Plugin version 4.354.v321ce67a_1de8 and earlier, representing a critical security flaw in the authentication mechanism of Jenkins continuous integration and delivery platform. This issue stems from the plugin's failure to properly validate the issuer claim within OpenID Connect ID tokens, creating a significant attack vector that could allow unauthorized individuals to bypass authentication controls and potentially escalate privileges to administrator level access within Jenkins environments.
The technical flaw manifests in the absence of validation for the `iss` (Issuer) claim within the OpenID Connect ID token processing logic. In proper OpenID Connect implementations, the issuer claim serves as a critical security control that establishes the trust relationship between the identity provider and the relying party. When this validation is omitted, attackers can manipulate the authentication flow by crafting malicious ID tokens with falsified issuer claims, effectively impersonating legitimate identity providers and gaining unauthorized access to Jenkins systems. This vulnerability directly violates the fundamental security principle of trust verification in authentication protocols and aligns with CWE-287 which addresses improper authentication issues in software systems.
The operational impact of this vulnerability extends beyond simple unauthorized access, as successful exploitation could lead to complete compromise of Jenkins environments. Attackers leveraging this flaw could gain access to sensitive build artifacts, source code repositories, and deployment configurations that Jenkins typically protects. The potential for privilege escalation to administrator level access means that attackers could modify build configurations, inject malicious code into the CI/CD pipeline, or even disable security controls within Jenkins. This represents a significant risk to software development integrity and could result in supply chain compromises that affect multiple downstream applications and systems relying on the compromised Jenkins infrastructure.
Organizations utilizing the affected Jenkins OpenId Connect Authentication Plugin should immediately prioritize patching to version 4.354.v321ce67a_1de8 or later, as this represents the most direct mitigation approach to resolve the issuer validation gap. Security teams should also implement additional monitoring controls to detect anomalous authentication patterns that might indicate exploitation attempts, particularly focusing on unusual authentication flows or multiple failed authentication attempts from unexpected sources. Network-level controls such as firewall rules restricting access to Jenkins endpoints and implementing multi-factor authentication as an additional security layer can provide defense-in-depth measures. The vulnerability's alignment with ATT&CK technique T1566.001 for credential harvesting through phishing and T1078.004 for valid accounts usage demonstrates the broader attack surface implications and the need for comprehensive security posture improvements beyond just patch management. Organizations should also conduct thorough security assessments of their Jenkins environments to identify other potential authentication bypass vulnerabilities and ensure proper configuration of identity provider trust relationships to prevent similar issues in other authentication modules.