PT-2021-20657 · Cisco · Cisco Small Business 220 Series Smart Switches

Qian Chen · Published 2021-10-06 · Updated 2021-10-14 · CVE-2021-34777

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: Cisco Small Business 220 Series Smart Switches (affected versions not specified)

Description: Multiple vulnerabilities exist in the Link Layer Discovery Protocol (LLDP) implementation. An unauthenticated, adjacent attacker could execute code on the affected device or cause it to reload unexpectedly, and cause LLDP database corruption on the affected device. To exploit these vulnerabilities, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

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

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2021-34777

Affected Products

Cisco Small Business 220 Series Smart Switches

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2021-34777 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34777 · Vendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T · Vendor Advisory
• https://t.me/cibsecurity/30113 · Telegram Post
• https://t.me/cvenotify/22027 · Telegram Post