CVE-2021-34791
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Application Level Gateway Bypass Vulnerabilities
Severity Score
5.3
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track
*SSVC
Descriptions
Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Translation (NAT) feature of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the ALG and open unauthorized connections with a host located behind the ALG. For more information about these vulnerabilities, see the Details section of this advisory. Note: These vulnerabilities have been publicly discussed as NAT Slipstreaming.
Varias vulnerabilidades en la Puerta de Enlace de Nivel de Aplicación (ALG) para la funcionalidad Network Address Translation (NAT) del software Cisco Adaptive Security Appliance (ASA) y el software Firepower Threat Defense (FTD) podrían permitir a un atacante remoto no autenticado omitir la ALG y abrir conexiones no autorizadas con un host situado detrás de la ALG. Para conseguir más información sobre estas vulnerabilidades, consulte la sección Detalles de este aviso. Nota: Estas vulnerabilidades se han discutido públicamente como NAT Slipstreaming
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-06-15 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-20: Improper Input Validation
- CWE-358: Improperly Implemented Security Check for Standard
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" | Asa 5512-x Firmware Search vendor "Cisco" for product "Asa 5512-x Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5512-x Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5512-x Search vendor "Cisco" for product "Asa 5512-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5512-x Firmware Search vendor "Cisco" for product "Asa 5512-x Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5512-x Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5512-x Search vendor "Cisco" for product "Asa 5512-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5505 Firmware Search vendor "Cisco" for product "Asa 5505 Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5505 Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5505 Search vendor "Cisco" for product "Asa 5505" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5505 Firmware Search vendor "Cisco" for product "Asa 5505 Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5505 Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5505 Search vendor "Cisco" for product "Asa 5505" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5515-x Firmware Search vendor "Cisco" for product "Asa 5515-x Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5515-x Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5515-x Search vendor "Cisco" for product "Asa 5515-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5515-x Firmware Search vendor "Cisco" for product "Asa 5515-x Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5515-x Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5515-x Search vendor "Cisco" for product "Asa 5515-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5525-x Firmware Search vendor "Cisco" for product "Asa 5525-x Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5525-x Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5525-x Search vendor "Cisco" for product "Asa 5525-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5525-x Firmware Search vendor "Cisco" for product "Asa 5525-x Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5525-x Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5525-x Search vendor "Cisco" for product "Asa 5525-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5545-x Firmware Search vendor "Cisco" for product "Asa 5545-x Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5545-x Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5545-x Search vendor "Cisco" for product "Asa 5545-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5545-x Firmware Search vendor "Cisco" for product "Asa 5545-x Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5545-x Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5545-x Search vendor "Cisco" for product "Asa 5545-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5555-x Firmware Search vendor "Cisco" for product "Asa 5555-x Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5555-x Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5555-x Search vendor "Cisco" for product "Asa 5555-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5555-x Firmware Search vendor "Cisco" for product "Asa 5555-x Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5555-x Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5555-x Search vendor "Cisco" for product "Asa 5555-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5580 Firmware Search vendor "Cisco" for product "Asa 5580 Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5580 Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5580 Search vendor "Cisco" for product "Asa 5580" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5580 Firmware Search vendor "Cisco" for product "Asa 5580 Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5580 Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5580 Search vendor "Cisco" for product "Asa 5580" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5585-x Firmware Search vendor "Cisco" for product "Asa 5585-x Firmware" | 009.008 Search vendor "Cisco" for product "Asa 5585-x Firmware" and version "009.008" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5585-x Search vendor "Cisco" for product "Asa 5585-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Asa 5585-x Firmware Search vendor "Cisco" for product "Asa 5585-x Firmware" | 009.015 Search vendor "Cisco" for product "Asa 5585-x Firmware" and version "009.015" | - |
Affected
| in | Cisco Search vendor "Cisco" | Asa 5585-x Search vendor "Cisco" for product "Asa 5585-x" | - | - |
Safe
|
| Cisco Search vendor "Cisco" | Adaptive Security Appliance Search vendor "Cisco" for product "Adaptive Security Appliance" | < 9.8.4.40 Search vendor "Cisco" for product "Adaptive Security Appliance" and version " < 9.8.4.40" | - |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense" | < 6.4.0.12 Search vendor "Cisco" for product "Firepower Threat Defense" and version " < 6.4.0.12" | - |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense" | >= 6.5.0 < 6.6.5 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.5.0 < 6.6.5" | - |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Firepower Threat Defense Search vendor "Cisco" for product "Firepower Threat Defense" | >= 6.7.0 < 6.7.0.2 Search vendor "Cisco" for product "Firepower Threat Defense" and version " >= 6.7.0 < 6.7.0.2" | - |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software" | >= 9.12.0 < 9.12.4.18 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.12.0 < 9.12.4.18" | - |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software" | >= 9.13.0 < 9.14.2.15 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.13.0 < 9.14.2.15" | - |
Affected
| ||||||
| Cisco Search vendor "Cisco" | Adaptive Security Appliance Software Search vendor "Cisco" for product "Adaptive Security Appliance Software" | >= 9.15.0 < 9.15.1.15 Search vendor "Cisco" for product "Adaptive Security Appliance Software" and version " >= 9.15.0 < 9.15.1.15" | - |
Affected
| ||||||