Improper input validation in Cisco Firepower Threat Defense Software
CVE-2023-20270
A vulnerability in the interaction between the Server Message Block (SMB) protocol preprocessor and the Snort 3 detection engine for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to bypass the configured policies or cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper error-checking when the Snort 3 detection engine is processing SMB traffic. An attacker could exploit this vulnerability by sending a crafted SMB packet stream through an affected device. A successful exploit could allow the attacker to cause the Snort process to reload, resulting in a DoS condition.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
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: 0.007 (50.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Cisco Firepower Threat Defense Software — versions 7.1.0, 7.1.0.1, 7.1.0.2
- Cisco Firepower Threat Defense — versions 7.1.0, 7.1.0.1, 7.1.0.2
- Cisco Secure Firewall Threat Defense — versions 7.1.0, 7.1.0.1, 7.1.0.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2023-20270?
- CVE-2023-20270 is a medium-severity vulnerability in Cisco Firepower Threat Defense Software, classified under Improper Input Validation. CVSS score: 5.8/10. Published 2023-11-01.
- How severe is CVE-2023-20270?
- Medium severity. CVSS v3 base score is 5.8 out of 10.