CVE-2024-43620
Heap-based Buffer Overflow (CWE-122)
Summary
Windows Telephony Service Remote Code Execution Vulnerability. This high-severity vulnerability affects the Windows Telephony Service, allowing for remote code execution. It has a CVSS base score of 8.8, indicating its critical nature. The vulnerability is network-based with low attack complexity and requires no privileges, but user interaction is necessary for exploitation. It is classified as a heap-based buffer overflow (CWE-122).
Impact
If successfully exploited, an attacker could execute arbitrary code on the target system with the same privileges as the Windows Telephony Service. The impact is severe across all security aspects: 1. Confidentiality: High impact - potential unauthorized access to sensitive information. 2. Integrity: High impact - possibility of data modification or corruption. 3. Availability: High impact - potential for system disruption or denial of service. Given that it's a network-based attack with low complexity, systems exposed to untrusted networks are at particular risk. The attacker could potentially gain control over the affected system, access sensitive data, modify information, or disrupt normal operations. The severity is amplified by the fact that the code execution occurs with service-level privileges, potentially allowing for significant system compromise.
Exploitation
There is no evidence that a public proof-of-concept exists. There is no evidence of proof of exploitation at the moment.
Patch
A patch is available. Microsoft released an official fix for this vulnerability on November 12, 2024. Given the high severity of the vulnerability, it is crucial to prioritize the application of this patch to all affected systems as soon as possible.
Mitigation
1. Apply the official patch released by Microsoft immediately to all affected systems. 2. Implement network segmentation to limit exposure of systems running the Windows Telephony Service, especially from untrusted networks. 3. Educate users about the risks of interacting with untrusted content or connecting to unknown servers, as user interaction is required for exploitation. 4. Monitor for suspicious activities related to the Windows Telephony Service. 5. Implement the principle of least privilege to minimize potential impact if exploitation occurs. 6. Ensure all Windows systems and software are kept up to date with the latest security updates. 7. Consider disabling the Windows Telephony Service on systems where it's not required. 8. Use intrusion detection/prevention systems (IDS/IPS) to detect and block potential exploitation attempts. 9. Regularly audit and assess the security of systems running the Windows Telephony Service.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Timeline
Detection for the vulnerability has been added to Qualys (92186)
A CVSS base score of 8.8 has been assigned.
Feedly found the first article mentioning CVE-2024-43620. See article
Feedly estimated the CVSS score as HIGH
NVD published the first details for CVE-2024-43620
Detection for the vulnerability has been added to Nessus (210865)
Detection for the vulnerability has been added to Nessus (210863)
Detection for the vulnerability has been added to Nessus (210858)
Detection for the vulnerability has been added to Nessus (210855)