PT-2020-3767 · Cisco · Cisco Small Business Smart/Managed Switches

Published 2020-08-19 · Updated 2021-10-19 · CVE-2020-3496

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Cisco Small Business Smart and Managed Switches (affected versions not specified)

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

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-04127

CVE-2020-3496

Affected Products

Cisco Small Business Smart/Managed Switches

References · 4

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbss-ipv6-dos-tsgqbffW · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3496 · Security Note
• https://bdu.fstec.ru/vul/2020-04127 · Security Note
• https://osv.dev/vulnerability/CVE-2020-3496 · Vendor Advisory