What happened
Researchers disclosed a vulnerability in AWS Bedrock AgentCore Code Interpreter that allows attackers to bypass sandbox isolation controls and establish covert command-and-control communication channels. The issue enables malicious code executed within the sandbox to exfiltrate data using DNS-based techniques, effectively evading standard monitoring and restrictions designed to contain execution environments. The vulnerability carries a CVSS score of 7.5, indicating a high severity risk, even though no CVE identifier has been assigned. By exploiting weaknesses in how the sandbox enforces isolation, attackers can transmit sensitive information outside the controlled environment without triggering typical security controls. The finding highlights gaps in sandbox enforcement within AI-driven execution environments.
Who is affected
Organizations using AWS Bedrock AgentCore Code Interpreter are affected, particularly environments where untrusted code execution is permitted and relies on sandboxing for containment.
Why CISOs should care
Sandbox bypass vulnerabilities undermine a core security control used to isolate untrusted code, potentially allowing attackers to exfiltrate data or establish covert communication channels within otherwise controlled environments.
3 practical actions
- Review sandbox configurations. Validate that isolation controls are properly enforced and monitor for unexpected outbound communication.
- Monitor DNS activity for anomalies. Detect covert channels that may be used for data exfiltration.
- Restrict execution of untrusted code. Limit exposure of sandbox environments to reduce exploitation risk.
For more coverage of newly disclosed security flaws, explore our reporting under the Vulnerabilities tag.