CVE-2018-19986 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://github.com/pr0v3rbs/CVE/tree/master/CVE-2018-1998620-2019990

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8