CVE-2021-34790

Published on: 10/27/2021 12:00:00 AM UTC

Last Modified on: 10/27/2022 04:43:00 PM UTC

CVE-2021-34790 - advisory for cisco-sa-natalg-bypass-cpKGqkng

Source: Mitre Source: NIST CVE.ORG Print: PDF PDF
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Certain versions of Adaptive Security Appliance from Cisco contain the following vulnerability:

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.

  • CVE-2021-34790 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • The Cisco PSIRT is aware that proof-of-concept exploit code is available for the vulnerabilities described in this advisory.
  • Affected Vendor/Software: URL Logo Cisco - Cisco Adaptive Security Appliance (ASA) Software version n/a

CVSS3 Score: 5.3 - MEDIUM

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
NETWORK LOW NONE NONE
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
UNCHANGED NONE LOW NONE

CVSS2 Score: 5 - MEDIUM

Access
Vector ⓘ		 Access
Complexity		 Authentication
NETWORK LOW NONE
Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
NONE PARTIAL NONE

CVE References

Description Tags ⓘ Link
Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Application Level Gateway Bypass Vulnerabilities tools.cisco.com
text/html
 URL Logo CISCO 20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Application Level Gateway Bypass Vulnerabilities
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Related QID Numbers

  • 317094 Cisco Adaptive Security Appliance (ASA) Software Application Level Gateway v Bypass Vulnerabilities (cisco-sa-natalg-bypass-cpKGqkng)
  • 317096 Cisco Firepower Threat Defense (FTD) Software Application Level Gateway (ALG) Bypass Vulnerabilities (cisco-sa-natalg-bypass-cpKGqkng)

Exploit/POC from Github

This repository contains a collection of data files on known Common Vulnerabilities and Exposures (CVEs). Each file i…

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
ApplicationCiscoAdaptive Security ApplianceAllAllAllAll
Hardware Device InfoCiscoAsa 5505-AllAllAll
Operating
System		CiscoAsa 5505 Firmware009.008AllAllAll
Operating
System		CiscoAsa 5505 Firmware009.015AllAllAll
Hardware Device InfoCiscoAsa 5512-x-AllAllAll
Operating
System		CiscoAsa 5512-x Firmware009.008AllAllAll
Operating
System		CiscoAsa 5512-x Firmware009.015AllAllAll
Hardware Device InfoCiscoAsa 5515-x-AllAllAll
Operating
System		CiscoAsa 5515-x Firmware009.008AllAllAll
Operating
System		CiscoAsa 5515-x Firmware009.015AllAllAll
Hardware Device InfoCiscoAsa 5525-x-AllAllAll
Operating
System		CiscoAsa 5525-x Firmware009.008AllAllAll
Operating
System		CiscoAsa 5525-x Firmware009.015AllAllAll
Hardware Device InfoCiscoAsa 5545-x-AllAllAll
Operating
System		CiscoAsa 5545-x Firmware009.008AllAllAll
Operating
System		CiscoAsa 5545-x Firmware009.015AllAllAll
Hardware Device InfoCiscoAsa 5555-x-AllAllAll
Operating
System		CiscoAsa 5555-x Firmware009.008AllAllAll
Operating
System		CiscoAsa 5555-x Firmware009.015AllAllAll
Hardware Device InfoCiscoAsa 5580-AllAllAll
Operating
System		CiscoAsa 5580 Firmware009.008AllAllAll
Operating
System		CiscoAsa 5580 Firmware009.015AllAllAll
Hardware Device InfoCiscoAsa 5585-x-AllAllAll
Operating
System		CiscoAsa 5585-x Firmware009.008AllAllAll
Operating
System		CiscoAsa 5585-x Firmware009.015AllAllAll
ApplicationCiscoFirepower Threat DefenseAllAllAllAll
  • cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:*:
  • 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_5512-x:-:*:*:*:*:*:*:*:
  • 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_5515-x:-:*:*:*:*:*:*:*:
  • 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_5525-x:-:*:*:*:*:*:*:*:
  • 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_5545-x:-:*:*:*:*:*:*:*:
  • 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_5555-x:-:*:*:*:*:*:*:*:
  • 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_5580:-:*:*:*:*:*:*:*:
  • 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_5585-x:-:*:*:*:*:*:*:*:
  • 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:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-34790 : Multiple vulnerabilities in the Application Level Gateway ALG for the Network Address Translatio… twitter.com/i/web/status/1… 2021-10-27 19:09:42
Twitter Icon @softek_jp Cisco ASA Software に SIP ALG を迂回されるなど複数の問題 (CVE-2021-34790, CVE-2021-34791) [40358] sid.softek.jp/content/show/4… #SIDfm #脆弱性情報 2021-10-28 07:30:49
Twitter Icon @SecRiskRptSME RT: CVE-2021-34790 Multiple vulnerabilities in the Application Level Gateway (ALG) for the Network Address Transla… twitter.com/i/web/status/1… 2021-10-28 07:33:52
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