An issue was discovered on Dasan GPON home routers. Command Injection can occur via the dest_host parameter in a diag_action=ping request to a GponForm/diag_Form URI. Because the router saves ping results in /tmp and transmits them to the user when the user revisits /diag.html, it's quite simple to execute commands and retrieve their output.
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.
| Link | Tags |
|---|---|
| http://www.securityfocus.com/bid/107053 | vdb entry third party advisory broken link |
| https://www.exploit-db.com/exploits/44576/ | exploit vdb entry third party advisory |
| https://www.vpnmentor.com/blog/critical-vulnerability-gpon-router/ | exploit third party advisory technical description |