CVE-2022-20922
Summary
| CVE | CVE-2022-20922 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2022-11-15 21:15:30 UTC |
| Updated | 2026-06-22 15:00:00 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 6.5 MEDIUM from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
EPSS: 0.007640000 probability, percentile 0.506670000 (date 2026-06-24)
Problem Types: CWE-244 | NVD-CWE-Other | CWE-244 Improper Clearing of Heap Memory Before Release ('Heap Inspection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L |
| 3.1 | [email protected] | Secondary | 5.8 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
| 3.1 | CNA | CVSSV3_1 | 5.8 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
LowAvailability
LowCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Cisco | Cyber Vision | 3.0.0 | All | All | All |
| Application | Cisco | Cyber Vision | 3.0.1 | All | All | All |
| Application | Cisco | Cyber Vision | 3.0.2 | All | All | All |
| Application | Cisco | Cyber Vision | 3.0.3 | All | All | All |
| Application | Cisco | Cyber Vision | 3.0.5 | All | All | All |
| Application | Cisco | Cyber Vision | 3.0.6 | All | All | All |
| Application | Cisco | Cyber Vision | 3.1.0 | All | All | All |
| Application | Cisco | Cyber Vision | 3.1.1 | All | All | All |
| Application | Cisco | Cyber Vision | 3.1.2 | All | All | All |
| Application | Cisco | Cyber Vision | 3.2.0 | All | All | All |
| Application | Cisco | Cyber Vision | 3.2.1 | All | All | All |
| Application | Cisco | Cyber Vision | 3.2.2 | All | All | All |
| Application | Cisco | Cyber Vision | 3.2.3 | All | All | All |
| Application | Cisco | Cyber Vision | 3.2.4 | All | All | All |
| Application | Cisco | Cyber Vision | 4.0.0 | All | All | All |
| Application | Cisco | Cyber Vision | 4.0.1 | All | All | All |
| Application | Cisco | Cyber Vision | 4.0.2 | All | All | All |
| Application | Cisco | Cyber Vision | 4.0.3 | All | All | All |
| Application | Cisco | Cyber Vision | 4.1.0 | All | All | All |
| Application | Cisco | Cyber Vision | 4.1.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.1.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.1.0.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.1.0.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.0.1 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 1.5.4 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 1.5.5 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 1.5.6 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.0.0 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.0.2 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.0.3 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.1.0 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.1.2 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.1.4 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.1.5 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.2 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.2.1 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.3 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.3.1 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.4 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.4.12 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.4.4 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.4.6 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.5 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.5.4 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.5.5 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.5.6 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.5.7 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.6.0 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.6.1 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.6.2 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.7 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.8 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 2.8.9 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 3.0 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 3.1 | All | All | All |
| Application | Cisco | Umbrella Virtual Appliance | 3.2 | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Multiple Cisco Products Snort SMB2 Detection Engine Policy Bypass and Denial of Service Vulnerabilities | af854a3a-2127-422b-91ae-364da2661108 | sec.cloudapps.cisco.com | |
| MISC:https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-smb-3nfhJtr | MITRE | tools.cisco.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
There are currently no legacy QID mappings associated with this CVE.