CVE-2021-40116
Multiple Cisco Products Snort Rule Denial of Service Vulnerability
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
Multiple Cisco products are affected by a vulnerability in Snort rules 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 handling of the Block with Reset or Interactive Block with Reset actions if a rule is configured without proper constraints. An attacker could exploit this vulnerability by sending a crafted IP packet to the affected device. A successful exploit could allow the attacker to cause through traffic to be dropped. Note: Only products with Snort3 configured and either a rule with Block with Reset or Interactive Block with Reset actions configured are vulnerable. Products configured with Snort2 are not vulnerable.
Múltiples productos de Cisco están afectados por una vulnerabilidad en las reglas de Snort que podría permitir a un atacante remoto no autenticado causar una condición de denegación de servicio (DoS) en un dispositivo afectado. La vulnerabilidad es debido al manejo inapropiado de las acciones de Bloqueo con Reinicio o Bloqueo Interactivo con Reinicio si una regla está configurada sin las restricciones apropiadas. Un atacante podría aprovechar esta vulnerabilidad mediante el envío de un paquete IP diseñado al dispositivo afectado. Una explotación con éxito podría permitir al atacante causar una caída del tráfico de paso. Nota: Sólo son vulnerables los productos con Snort3 configurado y con una regla con acciones de bloqueo con reinicio o de bloqueo interactivo con reinicio. Los productos configurados con Snort2 no son vulnerables
CVSS Scores
SSVC
- Decision:Attend
Timeline
- 2021-08-25 CVE Reserved
- 2021-10-27 CVE Published
- 2024-07-12 EPSS Updated
- 2024-11-07 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-241: Improper Handling of Unexpected Data Type
CAPEC
References (1)
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Cisco Search vendor "Cisco" | Firepower Management Center Search vendor "Cisco" for product "Firepower Management Center" | 3.1.0.1 Search vendor "Cisco" for product "Firepower Management Center" and version "3.1.0.1" | - |
Affected
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| Cisco Search vendor "Cisco" | Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense" | >= 6.4.0 < 6.4.0.13 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.4.0 < 6.4.0.13" | - |
Affected
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| Cisco Search vendor "Cisco" | Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense" | >= 6.6.0 < 6.6.5.1 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.6.0 < 6.6.5.1" | - |
Affected
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| Cisco Search vendor "Cisco" | Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense" | >= 6.7.0 < 6.7.0.3 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.7.0 < 6.7.0.3" | - |
Affected
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| Cisco Search vendor "Cisco" | Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense" | >= 7.0.0 < 7.0.1 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 7.0.0 < 7.0.1" | - |
Affected
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| Snort Search vendor "Snort" | Snort Search vendor "Snort" for product "Snort" | >= 3.0.0.0 < 3.1.0.100 Search vendor "Snort" for product "Snort" and version " >= 3.0.0.0 < 3.1.0.100" | - |
Affected
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