CVE-2018-19986

In the /HNAP1/SetRouterSettings message, the RemotePort parameter is vulnerable, and the vulnerability affects D-Link DIR-818LW Rev.A 2.05.B03 and DIR-822 B1 202KRb06 devices. In the SetRouterSettings.php source code, the RemotePort parameter is saved in the $path_inf_wan1."/web" internal configuration memory without any regex checking. And in the IPTWAN_build_command function of the iptwan.php source code, the data in $path_inf_wan1."/web" is used with the iptables command without any regex checking. A vulnerable /HNAP1/SetRouterSettings XML message could have shell metacharacters in the RemotePort element such as the `telnetd` string.

Affected products

D-Link Dir-818Lw, D-Link Dir-822

D-link dir-818lw Firmware

= 2.05.b03

Fix

Available

CVSS 2.0

10.0 HIGH

CVSS 3.1

9.8 CRITICAL

EPSS

41.6% (99th percentile)

Weakness

CWE-78

NVD status

Modified

Published

2019-05-13