CVE-2018-1000404 in AWS CodeBuild Plugin
Summary
by MITRE
Jenkins project Jenkins AWS CodeBuild Plugin version 0.26 and earlier contains a Insufficiently Protected Credentials vulnerability in AWSClientFactory.java, CodeBuilder.java that can result in Credentials Disclosure. This attack appear to be exploitable via local file access. This vulnerability appears to have been fixed in 0.27 and later.
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Analysis
by VulDB Data Team • 07/16/2020
The vulnerability identified as CVE-2018-1000404 affects the Jenkins AWS CodeBuild Plugin, specifically impacting versions 0.26 and earlier. This issue resides within the AWSClientFactory.java and CodeBuilder.java components of the plugin, where insufficient protection mechanisms fail to adequately secure sensitive credential information. The vulnerability represents a critical security flaw that allows for unauthorized access to AWS credentials stored within the Jenkins environment, potentially enabling attackers to gain elevated privileges and access cloud resources.
The technical flaw manifests through inadequate credential protection mechanisms that fail to properly secure authentication tokens and access keys used for AWS CodeBuild operations. When Jenkins processes AWS CodeBuild tasks, the plugin stores credential information in a manner that does not sufficiently obfuscate or encrypt sensitive data, making it accessible through local file system access. This weakness directly violates security principles outlined in CWE-522, which addresses insufficiently protected credentials, and aligns with ATT&CK technique T1552.2 for credentials from password storage providers. The vulnerability's exploitable nature through local file access means that any attacker with filesystem access to the Jenkins server can potentially extract stored credentials and leverage them for unauthorized cloud operations.
The operational impact of this vulnerability extends beyond simple credential disclosure, as it enables attackers to perform unauthorized actions within AWS environments. Once credentials are extracted, adversaries can execute CodeBuild operations, access cloud resources, and potentially escalate their privileges to gain broader access to the cloud infrastructure. This vulnerability particularly affects organizations relying on Jenkins for continuous integration and deployment workflows where AWS CodeBuild integration is utilized, creating potential for significant data breaches and unauthorized resource consumption. The risk is compounded by the fact that Jenkins servers often run with elevated privileges and may have access to multiple AWS accounts or resources, amplifying the potential damage from credential exposure.
Organizations should immediately upgrade to version 0.27 or later of the Jenkins AWS CodeBuild Plugin to remediate this vulnerability, as this release implements proper credential protection mechanisms that prevent unauthorized access to stored authentication information. System administrators should conduct thorough inventory checks to identify all instances of the vulnerable plugin version and ensure complete removal of the vulnerable components before applying updates. Additional mitigations include implementing strict file system access controls on Jenkins server installations, monitoring for unauthorized file access attempts, and conducting regular security assessments of CI/CD pipeline components. The fix addresses the underlying issue by implementing proper credential handling that prevents local file system access from exposing sensitive authentication data, thereby aligning with security best practices for credential management as recommended in industry standards such as NIST SP 800-63B for digital identity management and protection.