#VU57113 Out-of-bounds read in Cisco Small Business 220 Series Smart Switches - CVE-2021-34776 

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Main Vulnerability Database Vulnerabilities #VU57113

#VU57113 Out-of-bounds read in Cisco Small Business 220 Series Smart Switches - CVE-2021-34776

Published: October 7, 2021


Vulnerability identifier: #VU57113
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2021-34776
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability: No public exploit available
Vulnerable software:
Cisco Small Business 220 Series Smart Switches
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to missing length validation checks when processing LLDP messages in the Link Layer Discovery Protocol. A remote attacker on the local network can send a specially crafted LLDP packet, trigger out-of-bounds read error and cause corruption in the internal LLDP database of the affected device.


Remediation

Install updates from vendor's website.

External links