CVE-2024-43487
Published: 10 September 2024
Summary
CVE-2024-43487 is a medium-severity Protection Mechanism Failure (CWE-693) vulnerability in Microsoft Windows 10 22H2. Its CVSS base score is 6.5 (Medium).
Operationally, ranked in the top 9.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2024-43487 is a security feature bypass vulnerability in the Windows Mark of the Web mechanism. The affected component is the Windows operating system handling of downloaded files that carry Mark of the Web markings, which normally trigger security warnings or restrictions in applications such as browsers and email clients.
An unauthenticated remote attacker can exploit the flaw by supplying a specially crafted file over the network. User interaction is required to open the file, after which the bypass allows the attacker to achieve high-integrity impact without affecting confidentiality or availability.
The sole reference points to the Microsoft Security Response Center advisory, which is the authoritative source for patch availability and mitigation guidance. The EPSS score has remained flat at 0.0512 with no material increase since disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2024-40749
Vulnerability details
Windows Mark of the Web Security Feature Bypass Vulnerability
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Implements a reliable, tamperproof protection mechanism whose completeness can be assured.
Procedures for training on protection mechanisms reduce the chance of protection mechanism failures being present or exploitable.
Documented procedures to implement assessment, authorization, and monitoring controls prevent these protection mechanisms from failing due to undefined processes.
Direct evaluation of whether controls produce desired security outcomes detects protection mechanism failures and enables remediation.
Requires assessment that protection mechanisms are correctly implemented and producing intended security outcomes.
The POA&M process ensures identified weaknesses in protection mechanisms are documented and scheduled for remediation, reducing the duration they remain exploitable.
Ongoing control assessments and analysis of monitoring data enable timely detection and response when protection mechanisms fail.
Impact analysis identifies changes that could weaken or disable existing protection mechanisms.