SB2021100710 - Multiple vulnerabilities in Cisco Small Business 220 Series Smart Switches
Published: October 7, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2021-34775)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 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
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.
2) Out-of-bounds read (CVE-ID: CVE-2021-34776)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 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
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.
3) Out-of-bounds read (CVE-ID: CVE-2021-34777)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 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
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.
4) Out-of-bounds read (CVE-ID: CVE-2021-34778)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 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
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.
5) Buffer overflow (CVE-ID: CVE-2021-34779)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing LLDP messages in the Link Layer Discovery Protocol. A remote attacker on the local network can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
6) Buffer overflow (CVE-ID: CVE-2021-34780)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing LLDP messages in the Link Layer Discovery Protocol. A remote attacker on the local network can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.