Full Report
The vulnerability in AWS CodeBuild arises when a source code repository is configured to trigger builds based on pull requests or other actions from untrusted contributors. In such cases, an attacker can submit a pull request containing arbitrary code, which is then executed i...
Analysis Summary
# Vulnerability: AWS CodeBuild Secrets Extraction via Malicious Pull Requests
## CVE Details
- CVE ID: Not explicitly provided in the context.
- CVSS Score: Not explicitly provided in the context.
- CWE: Not explicitly provided in the context.
## Affected Systems
- Products: AWS CodeBuild, Amazon Q Developer Extension for Visual Studio
- Versions: Unspecified vulnerable versions of AWS CodeBuild configurations. Amazon Q Developer Extension versions prior to 1.85.0 are affected by post-exploitation artifact.
- Configurations: AWS CodeBuild projects configured to trigger builds based on pull requests or actions from untrusted contributors in source code repositories.
## Vulnerability Description
This vulnerability exists when an AWS CodeBuild project is configured to automatically trigger builds upon receiving actions (like a pull request) originating from untrusted third parties. An attacker can submit a malicious pull request containing arbitrary code. This code executes within the CodeBuild environment, allowing the attacker to perform memory dumping to extract sensitive secrets, such as credentials, stored within the build environment.
## Exploitation
- Status: Observed techniques indicate successful exploitation related to credential theft and secondary supply chain injection (involving Amazon Q extension deployment).
- Complexity: Implied Low to Medium, relying on standard pull request submission mechanisms.
- Attack Vector: Network (via repository interaction/pull request submission).
## Impact
- Confidentiality: High (Sensitive secrets and credentials can be extracted from the build environment).
- Integrity: High (Exploitation led to attempts to inject malicious code into consumer-facing software extensions).
- Availability: Low (Direct impact on build availability is not the primary vector, but subsequent actions could affect service integrity).
## Remediation
### Patches
- AWS CodeBuild: Patches addressing the core build execution vulnerability are assumed to be released by AWS, but specific version numbers were not detailed in the context.
- Amazon Q Developer Extension: Users should update to **version 1.85.0 or later**.
### Workarounds
- Restrict build triggers in AWS CodeBuild projects to only accept pull requests or actions originating from trusted sources or forks that have been manually reviewed.
- Review and minimize the permissions granted to CodeBuild service roles, specifically limiting access to sensitive resources if secrets are being injected via environment variables.
## Detection
- Indicators of Compromise (IOCs): Unexpected outbound network connections from the CodeBuild environment during or immediately after the build execution phase, particularly immediately following a build triggered by an external pull request.
- Detection Methods and Tools: Monitor AWS CloudTrail logs for anomalous activity originating from the assumed compromised execution role. Use security scanning tools within the build process to check for memory dumping attempts.
## References
- Vendor Advisories: AWS Security Advisories (Search required).
- Relevant Links: hxxps://archive.md/JPjuk#selection-547.0-727.104