CVE-2018-19990 Information

Description

In the /HNAP1/SetWiFiVerifyAlpha message the WPSPIN parameter is vulnerable and the vulnerability affects D-Link DIR-822 B1 202KRb06 devices. In the SetWiFiVerifyAlpha.php source code the WPSPIN parameter is saved in the $rphyinf1./media/wps/enrollee/pin\ and $rphyinf2./media/wps/enrollee/pin\ and $rphyinf3./media/wps/enrollee/pin\ internal configuration memory without any regex checking. And in the do_wps function of the wps.php source code the data in $rphyinf3./media/wps/enrollee/pin\ is used with the wpatalk command without any regex checking. A vulnerable /HNAP1/SetWiFiVerifyAlpha XML message could have shell metacharacters in the WPSPIN 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