CVE-2021-40114 : Exploit Details and Defense Strategies
Learn about CVE-2021-40114, a vulnerability in Cisco products allowing remote attackers to cause denial of service. Find mitigation steps and affected systems details.
A comprehensive guide on the Multiple Cisco Products Snort Memory Leak Denial of Service Vulnerability.
Understanding CVE-2021-40114
Details about the vulnerability affecting multiple Cisco products.
What is CVE-2021-40114?
The vulnerability allows remote attackers to cause a denial of service by exploiting the way the Snort detection engine processes ICMP traffic. Attackers can exhaust resources on affected devices, triggering a reload.
The Impact of CVE-2021-40114
The vulnerability could result in a denial of service condition on affected devices due to improper memory resource management while processing ICMP packets.
Technical Details of CVE-2021-40114
Insights into the vulnerability affecting Cisco products.
Vulnerability Description
The flaw arises in how the Snort detection engine handles ICMP packets, leading to a memory leak and potential DoS attacks.
Affected Systems and Versions
- Vendor: Cisco
- Product: Cisco Firepower Threat Defense Software
- Versions: Not applicable
Exploitation Mechanism
- Attackers exploit the vulnerability by sending a series of ICMP packets through the affected device.
Mitigation and Prevention
Tips to address and prevent vulnerabilities like CVE-2021-40114.
Immediate Steps to Take
- Apply vendor-provided patches promptly.
- Implement network segmentation to limit the impact of potential attacks.
Long-Term Security Practices
- Regularly update and patch all software and systems.
- Conduct security assessments and penetration testing periodically.
Patching and Updates
- Stay informed about security advisories and updates from the vendor.