CVE-2021-34787

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

Last Modified on: 10/29/2021 12:31:00 PM UTC

CVE-2021-34787 - advisory for cisco-sa-asaftd-rule-bypass-ejjOgQEY

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

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

A vulnerability in the identity-based firewall (IDFW) rule processing feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass security protections. This vulnerability is due to improper handling of network requests by affected devices configured to use object group search. An attacker could exploit this vulnerability by sending a specially crafted network request to an affected device. A successful exploit could allow the attacker to bypass access control list (ACL) rules on the device, bypass security protections, and send network traffic to unauthorized hosts.

  • CVE-2021-34787 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as MEDIUM severity.
  • The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is 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: 4.3 - MEDIUM

Access
Vector ⓘ		 Access
Complexity		 Authentication
NETWORK MEDIUM 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 Identity-Based Rule Bypass Vulnerability tools.cisco.com
text/html
 URL Logo CISCO 20211027 Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Identity-Based Rule Bypass Vulnerability
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Related QID Numbers

  • 317105 Cisco Adaptive Security Appliance Software (ASA) Identity-Based Rule Bypass Vulnerability (cisco-sa-asaftd-rule-bypass-ejjOgQEY)
  • 317106 Cisco Firepower Threat Defense (FTD) Software Identity-Based Rule Bypass Vulnerability (cisco-sa-asaftd-rule-bypass-ejjOgQEY)

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 Firmware009.009AllAllAll
Operating
System		CiscoAsa 5505 Firmware009.012AllAllAll
Hardware Device InfoCiscoAsa 5512-x-AllAllAll
Operating
System		CiscoAsa 5512-x Firmware009.009AllAllAll
Operating
System		CiscoAsa 5512-x Firmware009.012AllAllAll
Hardware Device InfoCiscoAsa 5515-x-AllAllAll
Operating
System		CiscoAsa 5515-x Firmware009.009AllAllAll
Operating
System		CiscoAsa 5515-x Firmware009.012AllAllAll
Hardware Device InfoCiscoAsa 5525-x-AllAllAll
Operating
System		CiscoAsa 5525-x Firmware009.009AllAllAll
Operating
System		CiscoAsa 5525-x Firmware009.012AllAllAll
Hardware Device InfoCiscoAsa 5545-x-AllAllAll
Operating
System		CiscoAsa 5545-x Firmware009.009AllAllAll
Operating
System		CiscoAsa 5545-x Firmware009.012AllAllAll
Hardware Device InfoCiscoAsa 5555-x-AllAllAll
Operating
System		CiscoAsa 5555-x Firmware009.009AllAllAll
Operating
System		CiscoAsa 5555-x Firmware009.012AllAllAll
Hardware Device InfoCiscoAsa 5580-AllAllAll
Operating
System		CiscoAsa 5580 Firmware009.009AllAllAll
Operating
System		CiscoAsa 5580 Firmware009.012AllAllAll
Hardware Device InfoCiscoAsa 5585-x-AllAllAll
Operating
System		CiscoAsa 5585-x Firmware009.009AllAllAll
Operating
System		CiscoAsa 5585-x Firmware009.012AllAllAll
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:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5505_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5512-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5512-x_firmware:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5512-x_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5515-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5515-x_firmware:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5515-x_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5525-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5525-x_firmware:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5525-x_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5545-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5545-x_firmware:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5545-x_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5555-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5555-x_firmware:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5555-x_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5580:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5580_firmware:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5580_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:h:cisco:asa_5585-x:-:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5585-x_firmware:009.009:*:*:*:*:*:*:*:
  • cpe:2.3:o:cisco:asa_5585-x_firmware:009.012:*:*:*:*:*:*:*:
  • cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:*:

Social Mentions

Source Title Posted (UTC)
Twitter Icon @CVEreport CVE-2021-34787 : A vulnerability in the identity-based firewall IDFW rule processing feature of Cisco Adaptive… twitter.com/i/web/status/1… 2021-10-27 19:09:26
Twitter Icon @SecRiskRptSME RT: CVE-2021-34787 A vulnerability in the identity-based firewall (IDFW) rule processing feature of Cisco Adaptive… twitter.com/i/web/status/1… 2021-10-28 07:33:50
Twitter Icon @Attackerkb_Bot A new #attackerkb assesment on 'CVE-2021-34787' has been created by ccondon-r7. Attacker Value: 4 | Exploitability:… twitter.com/i/web/status/1… 2021-10-29 17:40:59
Twitter Icon @AttackerKb Cisco ASA/FTD security bypass CVE-2021-34787 rated "Medium" severity. Admittedly not RCE, but "Medium" seems like l… twitter.com/i/web/status/1… 2021-10-29 17:44:22
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