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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.010 (62.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
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
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-r… (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.