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CVE-2018-19987

Description

D-Link DIR-822 Rev.B 202KRb06, DIR-822 Rev.C 3.10B06, DIR-860L Rev.B 2.03.B03, DIR-868L Rev.B 2.05B02, DIR-880L Rev.A 1.20B01_01_i3se_BETA, and DIR-890L Rev.A 1.21B02_BETA devices mishandle IsAccessPoint in /HNAP1/SetAccessPointMode. In the SetAccessPointMode.php source code, the IsAccessPoint parameter is saved in the ShellPath script file without any regex checking. After the script file is executed, the command injection occurs. A vulnerable /HNAP1/SetAccessPointMode XML message could have shell metacharacters in the IsAccessPoint element such as the `telnetd` string.

POC

Reference

- https://github.com/pr0v3rbs/CVE/tree/master/CVE-2018-19986%20-%2019990

Github

- https://github.com/ARPSyndicate/cvemon

- https://github.com/CVEDB/PoC-List

- https://github.com/George-RG/FirmaInc

- https://github.com/caro-oviedo/Copy-Editing

- https://github.com/nahueldsanchez/blogpost_cve-2018-19987-analysis

- https://github.com/pr0v3rbs/FirmAE

- https://github.com/sinword/FirmAE_Connlab