Vulnerability Description
A vulnerability in the Modbus preprocessor of the Snort detection engine could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an integer overflow while processing Modbus traffic. An attacker could exploit this vulnerability by sending crafted Modbus traffic through an affected device. A successful exploit could allow the attacker to cause the Snort process to hang, causing traffic inspection to stop.Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cyber Vision | 3.0.0 |
| Cisco | Firepower Threat Defense | 6.2.3 |
| Cisco | Unified Threat Defense Snort Intrusion Prevention System Engine | 3.17.0s |
Related Weaknesses (CWE)
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ciNot Applicable
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/ciVendor Advisory
FAQ
What is CVE-2022-20685?
CVE-2022-20685 is a vulnerability with a CVSS score of 7.5 (HIGH). A vulnerability in the Modbus preprocessor of the Snort detection engine could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulne...
How severe is CVE-2022-20685?
CVE-2022-20685 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-20685?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Cyber Vision, Cisco Firepower Threat Defense, Cisco Unified Threat Defense Snort Intrusion Prevention System Engine.