CVE-2021-34791

CVSS V2 Medium 5 CVSS V3 Medium 5.3
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.
Overview
  • CVE ID
  • CVE-2021-34791
  • Assigner
  • ykramarz@cisco.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-10-27T19:15:08
  • Last Modified Date
  • 2022-10-27T16:43:25
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* 1 OR 9.8.4.40
cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* 1 OR 9.12.0 9.12.4.18
cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* 1 OR 9.13.0 9.14.2.15
cpe:2.3:a:cisco:adaptive_security_appliance:*:*:*:*:*:*:*:* 1 OR 9.15.0 9.15.1.15
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* 1 OR 6.4.0.12
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* 1 OR 6.5.0 6.6.5
cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* 1 OR 6.7.0 6.7.0.2
AND
cpe:2.3:o:cisco:asa_5512-x_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5512-x_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:asa_5505_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5505_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5505:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:asa_5515-x_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5515-x_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:asa_5525-x_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5525-x_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:asa_5545-x_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5545-x_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:asa_5555-x_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5555-x_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:asa_5580_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5580_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:cisco:asa_5585-x_firmware:009.008:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:cisco:asa_5585-x_firmware:009.015:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 5.3
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 1.4
History
Created Old Value New Value Data Type Notes
2022-05-10 06:49:09 Added to TrackCVE
2022-12-05 13:21:55 psirt@cisco.com ykramarz@cisco.com CVE Assigner updated
2022-12-05 13:21:55 2021-10-27T19:15Z 2021-10-27T19:15:08 CVE Published Date updated
2022-12-05 13:21:55 2022-10-27T16:43:25 CVE Modified Date updated
2022-12-05 13:21:55 Analyzed Vulnerability Status updated