CVE-2023-20270
Last modified
CVE-2023-20270 is a medium-severity vulnerability rated 5.8/10 on the CVSS scale. 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. EPSS estimates a 0.67% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Firepower Threat Defense | 7.1.0 |
| Cisco | Firepower Threat Defense | 7.1.0.1 |
| Cisco | Firepower Threat Defense | 7.1.0.2 |
| Cisco | Firepower Threat Defense | 7.1.0.3 |
| Cisco | Firepower Threat Defense | 7.2.0 |
| Cisco | Firepower Threat Defense | 7.2.0.1 |
| Cisco | Firepower Threat Defense | 7.2.1 |
| Cisco | Firepower Threat Defense | 7.2.2 |
| Cisco | Firepower Threat Defense | 7.2.3 |
| Cisco | Firepower Threat Defense | 7.3.0 |
| Cisco | Firepower Threat Defense | 7.3.1 |
| Cisco | Firepower Threat Defense | 7.3.1.1 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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