CVE-2023-20270: Input Validation
First published: Wed Nov 01 2023(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-20270?
CVE-2023-20270 is 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.
How does CVE-2023-20270 impact Cisco Firepower Threat Defense?
CVE-2023-20270 could allow an unauthenticated, remote attacker to bypass configured policies or cause a denial of service (DoS) condition.
What is the severity of CVE-2023-20270?
The severity of CVE-2023-20270 is medium, with a severity value of 5.8.
Which versions of Cisco Firepower Threat Defense are affected by CVE-2023-20270?
Cisco Firepower Threat Defense versions 7.1.0 to 7.3.1.1 are affected by CVE-2023-20270.
How can I fix CVE-2023-20270?
Apply the necessary updates or patches provided by Cisco to fix CVE-2023-20270.
- agent/type
- agent/softwarecombine
- agent/first-publish-date
- collector/mitre-cve
- source/MITRE
- agent/severity
- agent/last-modified-date
- agent/references
- agent/author
- agent/weakness
- agent/description
- agent/event
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- vendor/cisco
- canonical/cisco firepower threat defense
- version/cisco firepower threat defense/7.1.0
- version/cisco firepower threat defense/7.1.0.1
- version/cisco firepower threat defense/7.1.0.2
- version/cisco firepower threat defense/7.1.0.3
- version/cisco firepower threat defense/7.2.0
- version/cisco firepower threat defense/7.2.0.1
- version/cisco firepower threat defense/7.2.1
- version/cisco firepower threat defense/7.2.2
- version/cisco firepower threat defense/7.2.3
- version/cisco firepower threat defense/7.3.0
- version/cisco firepower threat defense/7.3.1
- version/cisco firepower threat defense/7.3.1.1