Resource exhaustion in Cisco Firepower Threat Defense Software
CVE-2022-20767
A vulnerability in the Snort rule evaluation function of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of the DNS reputation enforcement rule. An attacker could exploit this vulnerability by sending crafted UDP packets through an affected device to force a buildup of UDP connections. A successful exploit could allow the attacker to cause traffic that is going through the affected device to be dropped, resulting in a DoS condition. Note: This vulnerability only affects Cisco FTD devices that are running Snort 3.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.017 (76.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.017 · change: +0.000
Affected products
- Cisco Firepower Threat Defense Software
- Cisco Firepower Threat Defense — versions 7.1.0
- Cisco Secure Firewall Threat Defense — versions 7.1.0
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-FTD-snor… (vendor-advisory, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2022-20767?
- CVE-2022-20767 is a high-severity vulnerability in Cisco Firepower Threat Defense Software, classified under CWE-399. CVSS score: 8.6/10. Published 2022-05-03.
- How severe is CVE-2022-20767?
- High severity. CVSS v3 base score is 8.6 out of 10.