Full Report
More than three-quarters of the vulnerabilities covered in the vendor’s monthly Patch Tuesday update are high-severity flaws. The post Microsoft patches 57 vulnerabilities, including 6 zero-days appeared first on CyberScoop.
Analysis Summary
# Vulnerability: Microsoft March 2025 Patch Tuesday - Six Actively Exploited Zero-Days
## CVE Details
- CVE ID: CVE-2025-24985, CVE-2025-24984, CVE-2025-24993, CVE-2025-24991, CVE-2025-26633, CVE-2025-24983 (and others)
- CVSS Score: Varies. Four of the zero-days are high-severity (though one explicitly mentioned, CVE-2025-24984, has a score of 4.6, which is Medium severity). Specific scores for all six are not provided uniformly.
- CWE: Not explicitly detailed for all, but includes Integer Overflow, Heap-based Buffer Overflow, Out-of-bound Read, Improper Neutralization, and Use-after-free.
## Affected Systems
- Products: Microsoft Windows components (including kernel, drivers, file system drivers like Fast FAT and NTFS), Microsoft Management Console (MMC), Windows Win32 Kernel Subsystem, Microsoft Office, and multiple Remote Desktop Services.
- Versions: Unspecified, but inferred to be various supported versions of Windows and related products prior to patching.
- Configurations: Affects fundamental drivers critical to Windows operations.
## Vulnerability Description
Microsoft patched 57 vulnerabilities in its March 2025 update, including six zero-days actively being exploited in attacks. Four of these zero-days affect core Windows file system components:
1. **CVE-2025-24985:** An integer overflow and heap-based buffer overflow in the Windows Fast FAT File System Driver.
2. **CVE-2025-24984:** A remote code execution (RCE) vulnerability in Windows NTFS.
3. **CVE-2025-24993:** A heap-based buffer overflow flaw in Windows NTFS.
4. **CVE-2025-24991:** An out-of-bound read defect in Windows NTFS.
5. **CVE-2025-26633:** An improper neutralization flaw in Microsoft Management Console.
6. **CVE-2025-24983:** A use-after-free vulnerability related to improp in the Windows Win32 Kernel Subsystem.
These kernel/driver-level flaws allow attackers to bypass application-level security, potentially gaining kernel-level or direct memory access.
## Exploitation
- Status: **Actively exploited in the wild** (All six zero-days are confirmed exploited and four are added to CISA's Known Exploited Vulnerabilities catalog).
- Complexity: Likely **Medium to High**, given the kernel-level impact. Researchers suggest APT groups and cybercriminals are leveraging these flaws.
- Attack Vector: Implied to be **Local** or **Network** depending on the specific vulnerability mechanism (RCE often implies remote potential, but kernel driver flaws sometimes require local access or specific preconditions).
## Impact
- Confidentiality: Likely **High** (due to kernel/direct memory access potential).
- Integrity: Likely **High** (due to kernel/direct memory access potential).
- Availability: Likely **High** (system stability risks from kernel manipulation).
## Remediation
### Patches
- Microsoft's March 2025 Security Update is available. Specific patch numbers are not listed in the summary, but users must apply the comprehensive cumulative updates.
### Workarounds
- No specific workarounds are detailed in the provided text outside of applying the patch. Given the critical nature of kernel driver exploits, immediate patching is advised over relying on workarounds.
## Detection
- Indicators of Compromise: Not specified, but look for unusual system calls or memory access violations related to the affected drivers (Fast FAT, NTFS, Win32 Kernel Subsystem).
- Detection methods and tools: Utilizing Endpoint Detection and Response (EDR) tools to monitor for activity exploiting memory corruption primitives (buffer overflows, UAF) in core operating system files/processes. CISA tracking lists provide specific CVEs for monitoring.
## References
- Vendor Advisories: hxxps://msrc.microsoft.com/update-guide/releaseNote/2025-Mar
- CISA KEV Catalog: hxxps://www.cisa.gov/news-events/alerts/2025/03/11/cisa-adds-six-known-exploited-vulnerabilities-catalog
- Specific CVE Links (For example): hxxps://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24984