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) 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 v3 4.7 MEDIUM
CVSS v2.0 5.0 MEDIUM

4.7^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

5.0^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:L/Au:N/C:N/I:P/A:N

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng	Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:cisco:adaptive_security_appliance::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:a:cisco:firepower_threat_defense::::::::
	cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::
	cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::
	cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::

Configuration 2 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5512-x_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5512-x_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5505_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5505_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*

Configuration 4 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5515-x_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5515-x_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*

Configuration 5 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5525-x_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5525-x_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*

Configuration 6 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5545-x_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5545-x_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*

Configuration 7 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5555-x_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5555-x_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*

Configuration 8 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5580_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5580_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*

Configuration 9 (hide)

AND

OR	cpe:2.3:o:cisco:asa_5585-x_firmware:009.008:::::::*
	cpe:2.3:o:cisco:asa_5585-x_firmware:009.015:::::::*

cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*

History

21 Nov 2024, 06:11

Type	Values Removed	Values Added
CVSS	v2 : ~~5.0~~ v3 : ~~5.3~~	v2 : 5.0 v3 : 4.7
References	~~() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng - Vendor Advisory~~	() https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng - Vendor Advisory

16 Aug 2023, 16:17

Type	Values Removed	Values Added
CPE		cpe:2.3:o:cisco:adaptive_security_appliance_software::::::::

29 Oct 2021, 14:29

Type	Values Removed	Values Added
References	~~(CISCO) https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng -~~	(CISCO) https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-natalg-bypass-cpKGqkng - Vendor Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 5.0 v3 : 5.3
CWE		CWE-20
CPE		cpe:2.3:h:cisco:asa_5512-x:-:::::::* cpe:2.3:o:cisco:asa_5525-x_firmware:009.008:::::::* cpe:2.3:o:cisco:asa_5505_firmware:009.015:::::::* cpe:2.3:h:cisco:asa_5505:-:::::::* cpe:2.3:a:cisco:adaptive_security_appliance:::::::: cpe:2.3:o:cisco:asa_5525-x_firmware:009.015:::::::* cpe:2.3:o:cisco:asa_5505_firmware:009.008:::::::* cpe:2.3:h:cisco:asa_5555-x:-:::::::* cpe:2.3:h:cisco:asa_5525-x:-:::::::* cpe:2.3:h:cisco:asa_5545-x:-:::::::* cpe:2.3:o:cisco:asa_5512-x_firmware:009.008:::::::* cpe:2.3:o:cisco:asa_5515-x_firmware:009.008:::::::* cpe:2.3:o:cisco:asa_5545-x_firmware:009.008:::::::* cpe:2.3:o:cisco:asa_5555-x_firmware:009.008:::::::* cpe:2.3:o:cisco:asa_5580_firmware:009.015:::::::* cpe:2.3:o:cisco:asa_5580_firmware:009.008:::::::* cpe:2.3:o:cisco:asa_5555-x_firmware:009.015:::::::* cpe:2.3:h:cisco:asa_5580:-:::::::* cpe:2.3:h:cisco:asa_5515-x:-:::::::* cpe:2.3:o:cisco:asa_5512-x_firmware:009.015:::::::* cpe:2.3:o:cisco:asa_5585-x_firmware:009.008:::::::* cpe:2.3:o:cisco:asa_5515-x_firmware:009.015:::::::* cpe:2.3:o:cisco:asa_5545-x_firmware:009.015:::::::* cpe:2.3:o:cisco:asa_5585-x_firmware:009.015:::::::* cpe:2.3:h:cisco:asa_5585-x:-:::::::* cpe:2.3:a:cisco:firepower_threat_defense::::::::

27 Oct 2021, 20:15

Type	Values Removed	Values Added
Summary	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.	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.

27 Oct 2021, 19:35

Type	Values Removed	Values Added
New CVE

Information

Published : 2021-10-27 19:15

Updated : 2024-11-21 06:11

NVD link : CVE-2021-34790

Mitre link : CVE-2021-34790

CVE.ORG link : CVE-2021-34790

JSON object : View

Products Affected

cisco

asa_5580
asa_5512-x_firmware
asa_5555-x_firmware
firepower_threat_defense
asa_5555-x
adaptive_security_appliance
asa_5525-x
asa_5505_firmware
asa_5515-x
adaptive_security_appliance_software
asa_5585-x
asa_5545-x_firmware
asa_5512-x
asa_5545-x
asa_5505
asa_5515-x_firmware
asa_5580_firmware
asa_5585-x_firmware
asa_5525-x_firmware

CWE

CWE-358

Improperly Implemented Security Check for Standard

CWE-20

Improper Input Validation

4.7 /10

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

5.0 /10

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

JSON object

Attach tags to CVE-2021-34790

4.7^/10

5.0^/10

Attach tags to `CVE-2021-34790`