Vulnerability in Cisco Adaptive Security Appliance
CVE-2021-34787
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.
EPSS: 0.010 (59.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Cisco Adaptive_security_appliance
- Cisco Adaptive_security_appliance_software
- Cisco Asa_5505
- Cisco Asa_5505_firmware — versions 009.009, 009.012
- Cisco Asa_5512-x
- Cisco Asa_5512-x_firmware — versions 009.009, 009.012
- Cisco Asa_5515-x
- Cisco Asa_5515-x_firmware — versions 009.009, 009.012
- Cisco Asa_5525-x
- Cisco Asa_5525-x_firmware — versions 009.009, 009.012
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-34787?
- CVE-2021-34787 is a medium-severity vulnerability in Cisco Adaptive Security Appliance, classified under CWE-183. CVSS score: 5.3/10. Published 2021-10-27.
- How severe is CVE-2021-34787?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2021-34787 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.