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CVE-2022-20922

MEDIUMCVSS 6.5/10EPSS 0.76%

Last modified

CVE-2022-20922 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
6.5/10

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

EPSS Probability
0.76%

50.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoFirepower Threat Defense7.1.0
CiscoFirepower Threat Defense7.1.0.1
CiscoFirepower Threat Defense7.1.0.2
CiscoFirepower Threat Defense7.2.0
CiscoFirepower Threat Defense7.2.0.1
CiscoUmbrella Virtual Appliance1.5.4
CiscoUmbrella Virtual Appliance1.5.5
CiscoUmbrella Virtual Appliance1.5.6
CiscoUmbrella Virtual Appliance2.0.0
CiscoUmbrella Virtual Appliance2.0.2
CiscoUmbrella Virtual Appliance2.0.3
CiscoUmbrella Virtual Appliance2.1.0
CiscoUmbrella Virtual Appliance2.1.2
CiscoUmbrella Virtual Appliance2.1.4
CiscoUmbrella Virtual Appliance2.1.5
CiscoUmbrella Virtual Appliance2.2
CiscoUmbrella Virtual Appliance2.2.1
CiscoUmbrella Virtual Appliance2.3
CiscoUmbrella Virtual Appliance2.3.1
CiscoUmbrella Virtual Appliance2.4
CiscoUmbrella Virtual Appliance2.4.4
CiscoUmbrella Virtual Appliance2.4.6
CiscoUmbrella Virtual Appliance2.4.12
CiscoUmbrella Virtual Appliance2.5
CiscoUmbrella Virtual Appliance2.5.4
CiscoUmbrella Virtual Appliance2.5.5
CiscoUmbrella Virtual Appliance2.5.6
CiscoUmbrella Virtual Appliance2.5.7
CiscoUmbrella Virtual Appliance2.6.0
CiscoUmbrella Virtual Appliance2.6.1
CiscoUmbrella Virtual Appliance2.6.2
CiscoUmbrella Virtual Appliance2.7
CiscoUmbrella Virtual Appliance2.8
CiscoUmbrella Virtual Appliance2.8.9
CiscoUmbrella Virtual Appliance3.0
CiscoUmbrella Virtual Appliance3.1
CiscoUmbrella Virtual Appliance3.2
CiscoCyber Vision3.0.0
CiscoCyber Vision3.0.1
CiscoCyber Vision3.0.2
CiscoCyber Vision3.0.3
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

Showing 50 of 57 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-20922?
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.
How severe is CVE-2022-20922?
CVE-2022-20922 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.
How do I fix CVE-2022-20922?
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-2022-20922?

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

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Source: NVD / NIST