SB2021031107 - Multiple vulnerabilities in NETGEAR JGS516PE and GS116Ev2
Published: March 11, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Improper access control (CVE-ID: CVE-2020-35220)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to improper access restrictions in the TFTP server. A remote attacker on the local network can bypass implemented security restrictions and update the switch firmware.
2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2020-35232)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to the firmware update mechanism does not properly implements internal checks such as firmware length or checksum validations. A remote attacker on the local network can use a specially crafted firmware files and overwrite the entire memory with custom code
3) Input validation error (CVE-ID: CVE-2020-35233)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the switch operating system is not able to manage concurrent processes while performing any action with TFTP server. A remote attacker on the local network can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.