SANS Internet Storm Center Stormcast Episode Highlights Cybersecurity Issues

The March 6, 2026, episode of the SANS Internet Storm Center Stormcast, recorded in Jacksonville, Florida, covers three primary cybersecurity topics. An undergraduate intern, Joseph Grun, analyzed honeypot data to track a scanner targeting specific exploits, emphasizing how such tools measure internet "background radiation" and help determine if an IP’s activity is widespread or targeted. A critical vulnerability was identified in the Pack4J JWT library, where an "algorithm confusion" flaw allows attackers to forge valid JSON Web Tokens by replacing asymmetric signatures with symmetric ones using public keys, enabling authentication bypass; CodeAnt disclosed the issue and provided exploit steps. Additionally, the open-source help desk software FreeScout was found vulnerable to remote code execution due to flawed file upload filtering that relies on file extensions, which can be bypassed with whitespace manipulation. The episode also noted Microsoft Authenticator’s incompatibility with GrapheneOS, a security-focused Android variant, as the app blocks rooted devices but fails to recognize GrapheneOS as non-rooted. The discussion underscored the risks of flexible standards in JWT implementations and the necessity of secure file handling practices.