AWS Bedrock Sandbox Allows DNS-Based Isolation Bypass
🔒 BeyondTrust researchers demonstrated that the Sandbox mode in AWS Bedrock AgentCore Code Interpreter permits outbound DNS A/AAAA queries that can be abused to create a bidirectional covert channel. By encoding data in DNS requests and responses they showed both data exfiltration and an interactive reverse shell without triggering network restrictions. AWS reproduced the report but characterized the behavior as intended and updated documentation rather than issuing a patch.
