PT-2021-4907 · Cisco · Cisco Small Business 220 Series Smart Switches

Qian Chen · Published 2021-10-06 · Updated 2021-11-06 · CVE-2021-34778

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 The issue is related to a buffer overflow vulnerability in the Link Layer Discovery Protocol (LLDP) implementation. An unauthenticated, adjacent attacker could execute code on the affected device, cause it to reload unexpectedly, or corrupt the LLDP database. To exploit this issue, an attacker must be in the same broadcast domain as the affected device.

Recommendations For Cisco Small Business 220 Series Smart Switches, update to the latest firmware version that addresses these vulnerabilities. At the moment, there is no information about specific steps for other potentially affected versions.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2021-05642

BDU:2021-05709

CVE-2021-34778

Affected Products

Cisco Small Business 220 Series Smart Switches

References · 7

• https://bdu.fstec.ru/vul/2021-05642 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb220-lldp-multivuls-mVRUtQ8T · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-34778 · Security Note
• https://osv.dev/vulnerability/CVE-2021-34778 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05709 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-34778#range-7008194 · Security Note
• https://t.me/cibsecurity/30117 · Telegram Post