CVE-2021-40114
Last modified
CVE-2021-40114 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. EPSS estimates a 2.37% chance of exploitation in the next 30 days.
Description
Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device, causing the device to reload.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Secure Firewall Management Center | 2.9.14.0 |
| Cisco | Secure Firewall Management Center | 2.9.15 |
| Cisco | Secure Firewall Management Center | 2.9.16 |
| Cisco | Secure Firewall Management Center | 2.9.17 |
| Cisco | Secure Firewall Threat Defense | < 6.4.0.12 |
| Cisco | Secure Firewall Threat Defense | >= 6.5.0, < 6.6.3 |
| Cisco | Secure Firewall Threat Defense | >= 6.7.0, < 6.7.0.2 |
| Cisco | Unified Threat Defense | >= 16.12, < 16.12.6 |
| Cisco | Unified Threat Defense | >= 17.3, < 17.3.4a |
| Cisco | Unified Threat Defense | >= 17.4, < 17.4.2 |
| Snort | Snort | >= 2.0.0, < 2.9.18 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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