CVE-2020-25757: A lack of input validation and access controls in Lua CGIs on D-Link DSR VPN routers may result in arbitrary input being passed to system command APIs, resulting in arbitrary command execution with...

Summary

A lack of input validation and access controls in Lua CGIs on D-Link DSR VPN routers may result in arbitrary input being passed to system command APIs, resulting in arbitrary command execution with root privileges. This affects DSR-150, DSR-250, DSR-500, and DSR-1000AC with firmware 3.14 and 3.17.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software

Vendor	Product	Affected versions
dlink	dsr-150_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-150_firmware::::::::`
dlink	dsr-150n_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-150n_firmware::::::::`
dlink	dsr-250_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-250_firmware::::::::`
dlink	dsr-250n_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-250n_firmware::::::::`
dlink	dsr-500_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-500_firmware::::::::`
dlink	dsr-500n_firmware	All versions `cpe:2.3:o:dlink:dsr-500n_firmware::::::::`
dlink	dsr-500ac_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-500ac_firmware::::::::`
dlink	dsr-1000_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-1000_firmware::::::::`
dlink	dsr-1000n_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-1000n_firmware::::::::`
dlink	dsr-1000ac_firmware	<= 3.17 `cpe:2.3:o:dlink:dsr-1000ac_firmware::::::::`

Original advisory text

A lack of input validation and access controls in Lua CGIs on D-Link DSR VPN routers may result in arbitrary input being passed to system command APIs, resulting in arbitrary command execution with...

A lack of input validation and access controls in Lua CGIs on D-Link DSR VPN routers may result in arbitrary input being passed to system command APIs, resulting in arbitrary command execution with root privileges. This affects DSR-150, DSR-250, DSR-500, and DSR-1000AC with firmware 3.14 and 3.17.

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP1... Vendor Advisory
https://www.digitaldefense.com/news/zero-day-vuln-d-link-vpn-routers/ Third Party Advisory
https://www.dlink.com/en/security-bulletin Vendor Advisory