CVE-2024-5227: tp-link omada_er605_firmware OS Command Injection

Vulnerability summary

CVE-2024-5227 is a high (CVSS 7.5) OS Command Injection vulnerability in tp-link omada_er605_firmware. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 52.9% of scored vulnerabilities.

Timeline

1. 23-05-2024
   PublishedVulnerability first disclosed.
2. 03-09-2024
   Last modifiedVulnerability information updated.

Description

TP-Link Omada ER605 PPTP VPN username Command Injection Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of TP-Link Omada ER605 routers. Authentication is not required to exploit this vulnerability. However, devices are only vulnerable if configured to use a PPTP VPN with LDAP authentication. The specific flaw exists within the handling of the username parameter provided to the /usr/bin/pppd endpoint. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-22446.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.