Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.516
EPSS Ranking 97.7%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 10.0
References
Products affected by CVE-2018-19986
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cpe:2.3:h:dlink:dir-818lw:-
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cpe:2.3:h:dlink:dir-822:-
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cpe:2.3:o:d-link:dir-818lw_firmware:2.05.b03
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cpe:2.3:o:d-link:dir-822_firmware:202krb06