CVE-2021-34787
Cisco Adaptive Security Appliance
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.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 5.3 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N- Weakness
- CWE-183
- Assigned by
- psirt@cisco.com
Dates
- Published
- 2021-10-27
- Last modified
- 2026-08-11
- Sources
- NVD
Affected products
- Cisco Adaptive Security Appliance- 9.8.4.40
- Cisco Secure Firewall Threat Defense- 6.4.0.13, 6.5.0 - 6.6.5, 6.7.0 - 6.7.0.3, 7.0.0 - 7.0.1
- Cisco Adaptive Security Appliance Software9.9.0 - 9.12.4.25, 9.13.0 - 9.14.3.1, 9.15.0 - 9.15.1.17, 9.16.0 - 9.16.1.28
- Cisco Asa 5512-X Firmware009.009, 009.012
- Cisco Asa 5512-Xall versions
- Cisco Asa 5505 Firmware009.009, 009.012
- Cisco Asa 5505all versions
- Cisco Asa 5515-X Firmware009.009, 009.012
- Cisco Asa 5515-Xall versions
- Cisco Asa 5525-X Firmware009.009, 009.012
- Cisco Asa 5525-Xall versions
- Cisco Asa 5545-X Firmware009.009, 009.012
As listed in the NVD configuration data. Not a statement about your estate.