Vulnerability identifier: #VU69245

Vulnerability risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-20943

CWE-ID: CWE-244

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cyber Vision
Client/Desktop applications / Antivirus software/Personal firewalls
FirePOWER Services
Client/Desktop applications / Antivirus software/Personal firewalls
Umbrella Secure Internet Gateway
Client/Desktop applications / Antivirus software/Personal firewalls
Meraki MX Security Appliances
Other software / Other software solutions
Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of system resources in the Server Message Block Version 2 (SMB2) processor of the Snort detection engine. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cyber Vision: 3.0 - 4.1

Meraki MX Security Appliances: MX15 - MX18

FirePOWER Services: All versions

Cisco Firepower Threat Defense (FTD):

Umbrella Secure Internet Gateway: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-smb-3nfhJtr

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.