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MEDIUM · 4.7

CVE-2021-34790

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)...

Vulnerability Description

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.

CVSS Score

4.7

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE

Affected Products

VendorProductVersions
CiscoAdaptive Security Appliance< 9.8.4.40
CiscoFirepower Threat Defense< 6.4.0.12
CiscoAdaptive Security Appliance Software>= 9.12.0, < 9.12.4.29
CiscoAsa 5512-X Firmware009.008
CiscoAsa 5512-X-
CiscoAsa 5505 Firmware009.008
CiscoAsa 5505-
CiscoAsa 5515-X Firmware009.008
CiscoAsa 5515-X-
CiscoAsa 5525-X Firmware009.008
CiscoAsa 5525-X-
CiscoAsa 5545-X Firmware009.008
CiscoAsa 5545-X-
CiscoAsa 5555-X Firmware009.008
CiscoAsa 5555-X-
CiscoAsa 5580 Firmware009.008
CiscoAsa 5580-
CiscoAsa 5585-X Firmware009.008
CiscoAsa 5585-X-

Related Weaknesses (CWE)

CWE-20CWE-358

References

FAQ

What is CVE-2021-34790?

CVE-2021-34790 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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)...

How severe is CVE-2021-34790?

CVE-2021-34790 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-34790?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Adaptive Security Appliance, Cisco Firepower Threat Defense, Cisco Adaptive Security Appliance Software, Cisco Asa 5512-X Firmware, Cisco Asa 5512-X.