Vulnerability Monitor

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CVE-2021-34791

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.

Published

2021-10-27T19:15:08.457

Last Modified

2024-11-21T06:11:12.753

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 4.7 (MEDIUM)

CVSSv2 Vector

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

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-358
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application cisco adaptive_security_appliance < 9.8.4.40 Yes
Application cisco firepower_threat_defense < 6.4.0.12 Yes
Application cisco firepower_threat_defense < 6.6.5 Yes
Application cisco firepower_threat_defense < 6.7.0.2 Yes
Operating System cisco adaptive_security_appliance_software < 9.12.4.18 Yes
Operating System cisco adaptive_security_appliance_software < 9.14.2.15 Yes
Operating System cisco adaptive_security_appliance_software < 9.15.1.15 Yes
Operating System cisco asa_5512-x_firmware 009.008 Yes
Operating System cisco asa_5512-x_firmware 009.015 Yes
Hardware cisco asa_5512-x - No
Operating System cisco asa_5505_firmware 009.008 Yes
Operating System cisco asa_5505_firmware 009.015 Yes
Hardware cisco asa_5505 - No
Operating System cisco asa_5515-x_firmware 009.008 Yes
Operating System cisco asa_5515-x_firmware 009.015 Yes
Hardware cisco asa_5515-x - No
Operating System cisco asa_5525-x_firmware 009.008 Yes
Operating System cisco asa_5525-x_firmware 009.015 Yes
Hardware cisco asa_5525-x - No
Operating System cisco asa_5545-x_firmware 009.008 Yes
Operating System cisco asa_5545-x_firmware 009.015 Yes
Hardware cisco asa_5545-x - No
Operating System cisco asa_5555-x_firmware 009.008 Yes
Operating System cisco asa_5555-x_firmware 009.015 Yes
Hardware cisco asa_5555-x - No
Operating System cisco asa_5580_firmware 009.008 Yes
Operating System cisco asa_5580_firmware 009.015 Yes
Hardware cisco asa_5580 - No
Operating System cisco asa_5585-x_firmware 009.008 Yes
Operating System cisco asa_5585-x_firmware 009.015 Yes
Hardware cisco asa_5585-x - No
References