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CVE-2022-20685

HIGHCVSS 7.5/10EPSS 1.39%

Last modified

CVE-2022-20685 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.39% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
1.39%

68.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoCyber Vision3.0.0
CiscoCyber Vision3.0.1
CiscoCyber Vision3.0.2
CiscoCyber Vision3.0.3
CiscoCyber Vision3.0.4
CiscoCyber Vision3.0.5
CiscoCyber Vision3.0.6
CiscoCyber Vision3.1.0
CiscoCyber Vision3.1.1
CiscoCyber Vision3.1.2
CiscoCyber Vision3.2.0
CiscoCyber Vision3.2.1
CiscoCyber Vision3.2.2
CiscoCyber Vision3.2.3
CiscoCyber Vision3.2.4
CiscoCyber Vision4.0.0
CiscoCyber Vision4.0.1
CiscoFirepower Threat Defense6.2.3
CiscoFirepower Threat Defense6.2.3.1
CiscoFirepower Threat Defense6.2.3.2
CiscoFirepower Threat Defense6.2.3.3
CiscoFirepower Threat Defense6.2.3.4
CiscoFirepower Threat Defense6.2.3.5
CiscoFirepower Threat Defense6.2.3.6
CiscoFirepower Threat Defense6.2.3.7
CiscoFirepower Threat Defense6.2.3.8
CiscoFirepower Threat Defense6.2.3.9
CiscoFirepower Threat Defense6.2.3.10
CiscoFirepower Threat Defense6.2.3.11
CiscoFirepower Threat Defense6.2.3.12
CiscoFirepower Threat Defense6.2.3.13
CiscoFirepower Threat Defense6.2.3.14
CiscoFirepower Threat Defense6.2.3.15
CiscoFirepower Threat Defense6.2.3.16
CiscoFirepower Threat Defense6.2.3.17
CiscoFirepower Threat Defense6.2.3.18
CiscoFirepower Threat Defense6.4.0
CiscoFirepower Threat Defense6.4.0.1
CiscoFirepower Threat Defense6.4.0.2
CiscoFirepower Threat Defense6.4.0.3
CiscoFirepower Threat Defense6.4.0.4
CiscoFirepower Threat Defense6.4.0.5
CiscoFirepower Threat Defense6.4.0.6
CiscoFirepower Threat Defense6.4.0.7
CiscoFirepower Threat Defense6.4.0.8
CiscoFirepower Threat Defense6.4.0.9
CiscoFirepower Threat Defense6.4.0.10
CiscoFirepower Threat Defense6.4.0.11
CiscoFirepower Threat Defense6.4.0.12
CiscoFirepower Threat Defense6.6.0

Showing 50 of 104 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2022-20685?
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.
How severe is CVE-2022-20685?
CVE-2022-20685 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.39% probability of exploitation in the next 30 days.
How do I fix CVE-2022-20685?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-20685?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST