Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Adaptive Security Appliance | < 9.8.4.40 |
| Cisco | Firepower Threat Defense | < 6.4.0.13 |
| Cisco | Adaptive Security Appliance Software | >= 9.9.0, < 9.12.4.25 |
| Cisco | Asa 5512-X Firmware | 009.009 |
| Cisco | Asa 5512-X | - |
| Cisco | Asa 5505 Firmware | 009.009 |
| Cisco | Asa 5505 | - |
| Cisco | Asa 5515-X Firmware | 009.009 |
| Cisco | Asa 5515-X | - |
| Cisco | Asa 5525-X Firmware | 009.009 |
| Cisco | Asa 5525-X | - |
| Cisco | Asa 5545-X Firmware | 009.009 |
| Cisco | Asa 5545-X | - |
| Cisco | Asa 5555-X Firmware | 009.009 |
| Cisco | Asa 5555-X | - |
| Cisco | Asa 5580 Firmware | 009.009 |
| Cisco | Asa 5580 | - |
| Cisco | Asa 5585-X Firmware | 009.009 |
| Cisco | Asa 5585-X | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aVendor Advisory
FAQ
What is CVE-2021-34787?
CVE-2021-34787 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 unaut...
How severe is CVE-2021-34787?
CVE-2021-34787 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-34787?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Adaptive Security Appliance, Cisco Firepower Threat Defense, Cisco Adaptive Security Appliance Software, Cisco Asa 5512-X Firmware, Cisco Asa 5512-X.