SB2021040812 - Multiple vulnerabilities in Cisco Small Business RV Series Routers
Published: April 8, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Memory leak (CVE-ID: CVE-2021-1251)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due to missing length validation of certain LLDP packet header fields. A remote attacker on the local network can send a specially crafted LLDP packet and perform denial of service attack.
2) Resource exhaustion (CVE-ID: CVE-2021-1308)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to missing length validation of certain LLDP packet header fields. A remote attacker on the local network can trigger resource exhaustion and perform a denial of service (DoS) attack.
3) Buffer overflow (CVE-ID: CVE-2021-1309)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the LLDP implementation. 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.