Vulnerability · Published Aug 26, 2020 · Assigned by cisco

CVE-2020-3496Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability

Medium 5.3

In plain English

A medium-severity improper input validation in Cisco Small Business 250 Series Smart Switches Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.7% (higher than 78% of all known vulnerabilities).

Severity (CVSS 3.0)5.3Medium

Exploit odds (30 days)1.7%top 22.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

A vulnerability in the IPv6 packet processing engine of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the switch management CLI to stop responding, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco Small Business 250 Series Smart Switches Software	n/a

Weakness: CWE-20 · Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

20200819 Cisco Small Business Smart and Managed Switches Denial of Service Vulnerability vendor-advisory, x_refsource_CISCO