CVE-2024-43491 Overview
Microsoft is aware of a vulnerability in the Servicing Stack that has rolled back the fixes for some vulnerabilities affecting Optional Components on Windows 10, version 1507 (initial version released July 2015). This means that an attacker could exploit these previously mitigated vulnerabilities on Windows 10, version 1507 (Windows 10 Enterprise 2015 LTSB and Windows 10 IoT Enterprise 2015 LTSB) systems that have installed updates until August 2024. All later versions of Windows 10 are not impacted by this vulnerability.
Critical Impact
Attackers can exploit previously mitigated vulnerabilities on affected systems, leading to potential control and data exposure.
Affected Products
- Microsoft Windows 10 1507
Discovery Timeline
- 2024-09-10 - CVE CVE-2024-43491 published to NVD
- 2024-09-26 - Last updated in NVD database
Technical Details for CVE-2024-43491
Vulnerability Analysis
This vulnerability affects the Windows 10 Servicing Stack, potentially rolling back prior security fixes. This can expose the system to known vulnerabilities, making it susceptible to attacks.
Root Cause
The root cause lies in the Servicing Stack's improper management of update rollbacks, which inadvertently reverts essential security patches.
Attack Vector
Network-based vector, as it can be exploited remotely over the network.
# PowerShell command example for illustrative purposes
(Get-HotFix | Where-Object { $_.HotFixID -eq "KB5035858" }).InstalledOn
Detection Methods for CVE-2024-43491
Indicators of Compromise
- Unexpected system instability
- Presence of old vulnerabilities
- Rollbacks on critical security patches
Detection Strategies
Utilize network traffic analysis to monitor for indicators of unauthorized access or anomalous behavior on affected systems.
Monitoring Recommendations
Regularly check system logs for any signs of rollback activity and use SentinelOne to automatically identify and remediate suspicious activities related to this vulnerability.
How to Mitigate CVE-2024-43491
Immediate Actions Required
- Install September 2024 Servicing Stack update (SSU KB5043936)
- Apply September 2024 Windows security update (KB5043083)
- Audit systems for existing vulnerabilities
Patch Information
Refer to the Microsoft Security Update Guide for detailed patching instructions and download links.
Workarounds
Consider applying temporary network isolation to vulnerable systems and use Endpoint Detection and Response tools to prevent exploitation.
# Example firewall rule to temporarily isolate affected systems
echo "Blocking inbound access to Services"
iptables -A INPUT -p tcp --dport 445 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
