CVE-2022-20943
CVE-2022-20943
In short
A flaw in Cisco's Snort security tool allows attackers to send specially crafted network messages (SMB2) that can crash the security system or bypass its protections, potentially letting malicious traffic reach protected networks.
Technical detail
The vulnerability exists in improper resource management within the Snort 3 SMB2 processor when handling high-rate SMB2 traffic. An unauthenticated remote attacker can trigger Snort process reloads causing DoS; when preserve-connection is enabled (default), policy bypass and payload delivery become possible without authentication or prior access.
Summary generated and translated by AI from the official 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
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