CVE-2021-25666 Explained : Impact and Mitigation
Learn about CVE-2021-25666 impacting Siemens SCALANCE W780 and W740 (IEEE 802.11n) family, leading to partial denial-of-service. Find mitigation steps and patches.
A vulnerability has been identified in SCALANCE W780 and W740 (IEEE 802.11n) family (All versions < V6.3). Sending specially crafted packets through the ARP protocol to an affected device could cause a partial denial-of-service, preventing the device to operate normally for a short period of time.
Understanding CVE-2021-25666
This CVE impacts the SCALANCE W780 and W740 (IEEE 802.11n) family of products by Siemens, potentially leading to a partial denial-of-service condition.
What is CVE-2021-25666?
CVE-2021-25666 is a vulnerability found in Siemens' SCALANCE W780 and W740 (IEEE 802.11n) family where attackers could exploit the ARP protocol to trigger a partial denial-of-service.
The Impact of CVE-2021-25666
The vulnerability could disrupt the normal operation of affected devices for a short duration, impacting the reliability of the network infrastructure.
Technical Details of CVE-2021-25666
This section dives into the technical aspects of the vulnerability.
Vulnerability Description
The vulnerability lies in the handling of ARP packets in SCALANCE W780 and W740 devices, allowing attackers to disrupt normal operations.
Affected Systems and Versions
All versions of SCALANCE W780 and W740 (IEEE 802.11n) family below V6.3 are vulnerable to this issue.
Exploitation Mechanism
By sending specially crafted packets through the ARP protocol, threat actors can trigger the denial-of-service condition on susceptible devices.
Mitigation and Prevention
Protecting systems from CVE-2021-25666 requires a proactive approach to security measures.
Immediate Steps to Take
To mitigate the risk, users should consider applying vendor-supplied patches or updates promptly. Network segmentation and traffic monitoring can also help detect and prevent potential attacks.
Long-Term Security Practices
Implementing network access controls, intrusion detection systems, and regular security audits are essential for maintaining a secure network environment.
Patching and Updates
Siemens has released patches to address the vulnerability. It is crucial for organizations to apply these patches as soon as possible to safeguard their systems against potential threats.