Comparison Overview

go-witness and witness are Go modules for generating attestations. In go-witness versions 0.8.6 and earlier and witness versions 0.9.2 and earlier the AWS attestor improperly verifies AWS EC2 instance identity documents. Verification can incorrectly succeed when a signature is not present or is empty, and when RSA signature verification fails. The attestor also embeds a single legacy global AWS public certificate and does not account for newer region specific certificates issued in 2024, making detection of forged documents difficult without additional trusted region data. An attacker able to supply or intercept instance identity document data (such as through Instance Metadata Service impersonation) can cause a forged identity document to be accepted, leading to incorrect trust decisions based on the attestation. This is fixed in go-witness 0.9.1 and witness 0.10.1. As a workaround, manually verify the included identity document, signature, and public key with standard tools (for example openssl) following AWS’s verification guidance, or disable use of the AWS attestor until upgraded.

• https://github.com/in-toto/go-witness/commit/04ff20b600e28ce8fd1aa287534dd383a1cfefb9
• https://github.com/in-toto/go-witness/security/advisories/GHSA-72c7-4g63-hpw5

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Ventura 13.7.7, macOS Sonoma 14.7.7, macOS Sequoia 15.6. An app may be able to access sensitive user data.

• https://support.apple.com/en-us/124149
• https://support.apple.com/en-us/124150
• https://support.apple.com/en-us/124151

A double free issue was addressed with improved memory management. This issue is fixed in macOS Sequoia 15.6, iOS 18.6 and iPadOS 18.6, watchOS 11.6, tvOS 18.6, visionOS 2.6, macOS Ventura 13.7.7, macOS Sonoma 14.7.7, iPadOS 17.7.9. An app may be able to cause unexpected system termination.

• https://support.apple.com/en-us/124147
• https://support.apple.com/en-us/124148
• https://support.apple.com/en-us/124149
• https://support.apple.com/en-us/124150
• https://support.apple.com/en-us/124151
• https://support.apple.com/en-us/124153
• https://support.apple.com/en-us/124154
• https://support.apple.com/en-us/124155

The issue was addressed with improved authentication. This issue is fixed in macOS Sequoia 15.6. A local attacker may be able to elevate their privileges.

• https://support.apple.com/en-us/124149

The issue was resolved by not loading remote images This issue is fixed in iOS 18.6 and iPadOS 18.6. Forwarding an email could display remote images in Mail in Lockdown Mode.

• https://support.apple.com/en-us/124147