SB2020112414 - Multiple vulnerabilities in TP-Link TL-WPA4220

Description

This security bulletin contains information about 2 vulnerabilities.

1) OS Command Injection (CVE-ID: CVE-2020-24297)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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 shell commands on the target system.

The vulnerability exists due to improper input validation. A remote authenticated attacker can send a specially crafted POST request to the endpoint /admin/powerline and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

2) Stack-based buffer overflow (CVE-ID: CVE-2020-28005)

CWE-ID: CWE-121 - Stack-based buffer overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in httpd. A remote authenticated attacker can send a specially crafted POST request to the /admin/syslog endpoint, trigger stack-based buffer overflow and cause a denial of service condition on the target system.

Remediation

Install update from vendor's website.

References

• https://the-hyperbolic.com/posts/vulnerabilities-in-tlwpa4220/
• https://www.tp-link.com/us/support/download/
• https://www.tp-link.com/us/security