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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
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.
Metrics
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CVE Modified by Cisco Systems, Inc.5/14/2024 5:15:26 AM
Action
Type
Old Value
New Value
CVE Modified by Cisco Systems, Inc.11/06/2023 10:36:25 PM
Action
Type
Old Value
New Value
Removed
CVSS V3
Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
Added
CVSS V3.1
Cisco Systems, Inc. AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N
CPE Deprecation Remap by NIST8/16/2023 12:17:07 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.12.0 from (excluding) 9.12.4.18
OR
*cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.12.0 from (excluding) 9.12.4.18
CPE Deprecation Remap by NIST8/16/2023 12:17:07 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.15.0 from (excluding) 9.15.1.15
OR
*cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.15.0 from (excluding) 9.15.1.15
CPE Deprecation Remap by NIST8/16/2023 12:17:07 PM
Action
Type
Old Value
New Value
Changed
CPE Configuration
OR
*cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.13.0 from (excluding) 9.14.2.15
OR
*cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:* versions from (including) 9.13.0 from (excluding) 9.14.2.15
Reanalysis by NIST10/27/2022 12:43:25 PM
Action
Type
Old Value
New Value
Initial Analysis by NIST10/29/2021 10:21:53 AM
Action
Type
Old Value
New Value
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5505_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5505_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5512-x_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5512-x_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5515-x_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5515-x_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5525-x_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5525-x_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5545-x_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5545-x_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5555-x_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5555-x_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5580_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5580_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*
Added
CPE Configuration
AND
OR
*cpe:2.3:o:cisco:asa_5585-x_firmware:009.008:*:*:*:*:*:*:*
*cpe:2.3:o:cisco:asa_5585-x_firmware:009.015:*:*:*:*:*:*:*
OR
cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*
OR
*cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions up to (excluding) 9.8.4.40
*cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.12.0 up to (excluding) 9.12.4.18
*cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.13.0 up to (excluding) 9.14.2.15
*cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* versions from (including) 9.15.0 up to (excluding) 9.15.1.15
*cpe:2.3:
Added
CVSS V2
NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N)
Added
CVSS V3.1
NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Added
CWE
NIST CWE-20
Changed
Reference Type
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng No Types Assigned
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
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 NA
Quick Info
CVE Dictionary Entry: CVE-2021-34791 NVD
Published Date: 10/27/2021 NVD
Last Modified: 11/06/2023
Source: Cisco Systems, Inc.
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