Resource exhaustion in Cisco Firepower Threat Defense Software
CVE-2021-40114
Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device, causing the device to reload.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.025 (84.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 84.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.025 · change: +0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-do… (vendor-advisory, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2023/02/msg00011.html (mailing-list)
- www.debian.org/security/2023/dsa-5354 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-40114?
- CVE-2021-40114 is a medium-severity vulnerability in Cisco Firepower Threat Defense Software, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.8/10. Published 2021-10-27.
- How severe is CVE-2021-40114?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2021-40114 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.