Libbiosig, Grassroot DiCoM, Smallstep step-ca vulnerabilities
Summary: Cisco Talos disclosed vulnerabilities in Biosig Project libbiosig, Grassroot DiCoM, and Smallstep step-ca, with all patched by their vendors except Grassroot, whose DiCoM flaws remain zero-days. The findings include stack-based buffer overflows in libbiosig 3.9.1's MFER parsing (CVE-2025-66043 through CVE-2025-66048) that could lead to arbitrary code execution, three out-of-bounds reads in DiCoM, and an authentication bypass in step-ca (CVE-2025-44005) that lets an attacker force an ACME or SCEP provisioner to create certificates without completing protocol authorization checks.
What's compelling: The step-ca flaw lets an attacker obtain certificates without passing authorization checks, which undermines the trust anchor for X.509 and SSH across everything that CA issues. The DiCoM vulnerabilities are still unpatched zero-days, so medical imaging pipelines have no vendor fix to apply yet.
Read the original at Cisco Talos ↗
- Topics
- Vulnerabilities & Patching
- Mentions
- CVE-2025-44005CVE-2025-66043CVE-2025-66048
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