Resource exhaustion in Cisco Firepower Threat Defense Software
CVE-2022-20950
A vulnerability in the interaction of SIP and Snort 3 for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 3 detection engine to restart. This vulnerability is due to a lack of error-checking when SIP bidirectional flows are being inspected by Snort 3. An attacker could exploit this vulnerability by sending a stream of crafted SIP traffic through an interface on the targeted device. A successful exploit could allow the attacker to trigger a restart of the Snort 3 process, resulting in a denial of service (DoS) condition.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.008 (56.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.000
Affected products
- Cisco Firepower Threat Defense Software — versions 7.2.0, 7.2.0.1
- Cisco Firepower Threat Defense — versions 7.2.0, 7.2.0.1
- Cisco Secure Firewall Threat Defense — versions 7.2.0, 7.2.0.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2022-20950?
- CVE-2022-20950 is a medium-severity vulnerability in Cisco Firepower Threat Defense Software, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.8/10. Published 2022-11-15.
- How severe is CVE-2022-20950?
- Medium severity. CVSS v3 base score is 5.8 out of 10.