Out-of-Bounds Write in Microsoft Windows ActiveX (CVE‑2013‑3918) Enables Remote Code Execution
What It Is — The InformationCardSigninHelper ActiveX control (icardie.dll) in Microsoft Windows contains an out‑of‑bounds write flaw. A malicious web page can trigger the bug and execute arbitrary code in the context of the logged‑in user.
Exploitability — Publicly disclosed; proof‑of‑concept pages are available. No large‑scale exploit campaign is known, but the vulnerability is trivial to weaponize on browsers that still permit ActiveX. CVSS v3.1 = 7.8 (High).
Affected Products — Windows client and server releases that ship icardie.dll (e.g., Windows 7, Windows 8, Windows Server 2008 R2). Many of these versions are now end‑of‑life or end‑of‑service.
Why It Matters for Trust & Control Assurance
- Highlights the importance of continuous asset‑inventory and lifecycle management; unmanaged EoL assets create a compliance gap across frameworks.
- Patch‑management evidence is a core control objective that maps to multiple standards (NIST CSF Protect, ISO 27001 Asset Management, etc.).
- An unpatched ActiveX component can erode the defensible audit trail that regulators and enterprise buyers demand for trust‑by‑design operations.
Recommended Actions
- Run an inventory scan to locate every endpoint with
icardie.dll. - Deploy Microsoft’s security update or, if unavailable, disable/remove the ActiveX control.
- Record remediation steps in your control‑evidence repository and map them to the “Patch Management” control objective.
- For any EoL/EoS systems, create a migration plan and retain documented justification for continued use.
Source: CISA KEV – CVE‑2013‑3918