CVE-2023-39152 in Gradle Plugin
Summary
by MITRE • 07/26/2023
Always-incorrect control flow implementation in Jenkins Gradle Plugin 2.8 may result in credentials not being masked (i.e., replaced with asterisks) in the build log in some circumstances.
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Analysis
by VulDB Data Team • 08/18/2023
The vulnerability identified as CVE-2023-39152 resides within the Jenkins Gradle Plugin version 2.8, specifically manifesting as an always-incorrect control flow implementation that compromises the proper masking of credentials within build logs. This issue represents a critical security flaw that directly impacts the confidentiality and integrity of sensitive information processed through Jenkins automation pipelines. The vulnerability stems from improper handling of credential masking logic, where the plugin fails to consistently replace sensitive data with asterisks during log output generation, potentially exposing authentication tokens, passwords, and other confidential information to unauthorized parties who might access build logs.
The technical root cause of this vulnerability lies in the flawed control flow logic that governs when and how credentials should be masked within the plugin's logging mechanisms. This implementation error creates a condition where credential masking is bypassed under certain circumstances, allowing sensitive data to remain visible in plaintext within build output. The issue demonstrates characteristics consistent with CWE-546, which addresses the presence of backdoor or trap door in security software, as the flawed implementation effectively creates an unintended pathway for credential exposure. The vulnerability affects the plugin's ability to properly sanitize log output, creating a persistent security gap that could be exploited by malicious actors with access to build logs or monitoring systems.
The operational impact of CVE-2023-39152 extends beyond simple credential exposure, as it undermines the fundamental security posture of Jenkins-based CI/CD environments. When credentials remain visible in build logs, attackers can potentially harvest authentication tokens, API keys, and other sensitive information that may be used for lateral movement within the organization's infrastructure. This vulnerability directly violates security best practices outlined in the OWASP Top Ten, specifically addressing the risk of exposure of sensitive data through insecure logging mechanisms. The impact is particularly severe in enterprise environments where Jenkins serves as a central automation platform, as compromised credentials could lead to unauthorized access to production systems, source code repositories, and other critical infrastructure components.
Organizations utilizing Jenkins Gradle Plugin 2.8 should immediately implement mitigation strategies to address this vulnerability. The primary recommendation involves upgrading to a patched version of the Jenkins Gradle Plugin that resolves the control flow implementation issues. Security teams should also conduct comprehensive audit reviews of existing build logs to identify any potential credential exposure that may have occurred prior to patching. Additionally, implementing log sanitization policies and monitoring for credential exposure patterns can provide additional layers of defense. The vulnerability aligns with ATT&CK technique T1552.001, which focuses on credentials in files, as it creates an environment where sensitive information stored in build logs becomes accessible through improper credential masking. Organizations should also consider implementing automated security scanning tools that can detect and alert on credential exposure patterns within log files, ensuring continuous monitoring of the security posture.
The remediation process requires careful consideration of the plugin's dependency on specific Jenkins versions and compatibility with existing build configurations. Security administrators must ensure that patching activities do not disrupt existing CI/CD workflows while maintaining the integrity of the security controls. Regular security assessments of Jenkins environments should include verification of credential masking functionality across all installed plugins to prevent similar vulnerabilities from emerging in other components of the automation infrastructure. This vulnerability serves as a reminder of the critical importance of proper input validation and secure coding practices in security-sensitive software components, particularly those handling sensitive data within automated environments.