A recent Volatility Labs post by Michael Ligh entitled “TrueCrypt Master Key Extraction and Volume Identification” discusses how the memory forensics framework Volatility can extract TrueCrypt disk encryption keys from captured memory. Attackers able to extract these keys would be able to decrypt TrueCrypt-encrypted volumes and recover supposedly secure data at-rest.
This is not a TrueCrypt-specific issue, but rather applies to any memory contents including encryption keys, digital certificates, or sensitive data such as credit card numbers. An attacker able to access memory, either via software vulnerabilities or through physical extraction, can recover these memory contents.
When it comes to physical attacks to extract memory, such as the “Cold Boot Attack”, one countermeasure is full-memory encryption. By fully encrypting contents of memory, even an attacker able to extract memory through physical attacks would only see encrypted ciphertext.
PrivateCore vCage is the only commercially available system that fully encrypts memory on commodity x86 systems. Contact us to understand the issue or explore how vCage can help protect your memory, particularly your data-at-rest encryption keys.