CVE-2018-19986
CVSS v3
9.8
CRITICAL
EPSS Score
54.9 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2019-05-13
Frequently asked questions
What is 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.
Is CVE-2018-19986 actively exploited?
Active exploitation of CVE-2018-19986 has not been confirmed. The EPSS score is 54.9%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-19986?
CVE-2018-19986 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2018-19986 affecting your environment?
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