CVE-2022-20675 Multiple Cisco Security Products Simple Network Management Protocol Service Denial of Service Vulnerability

Medium 5.3 Published 6 Apr 2022 Updated 6 Nov 2024

Unauthenticated remote attackers can crash the SNMP service on Cisco security appliances by connecting to TCP port 199, causing a denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-20675?

CVE-2022-20675 is a medium-severity denial of service vulnerability in Cisco Asyncos, published on 6 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability in the TCP/IP stack of Cisco Email Security Appliance (ESA), Cisco Web Security Appliance (WSA), and Cisco Secure Email and Web Manager, formerly Security Management Appliance, could allow an unauthenticated, remote attacker to crash the Simple Network Management Protocol (SNMP) service, resulting in a denial of service (DoS) condition. This vulnerability is due to an open port listener on TCP port 199. An attacker could exploit this vulnerability by connecting to TCP port 199. A successful exploit could allow the attacker to crash the SNMP service, resulting in a DoS condition.

Weakness: CWE-248

Which versions are affected by CVE-2022-20675?

It affects 1 product.

Products include Cisco Asyncos.

How do I fix CVE-2022-20675?

No fix has been published for CVE-2022-20675 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2022-20675 being exploited?

There is no known exploitation of CVE-2022-20675 in the wild and no public exploit code.

All Cisco Asyncos vulnerabilities

Sources

Also known as GHSA-hw6v-rjm4-5m34.