CVE-2017-8404: Command Injection
First published: Tue Jul 02 2019(Updated: )
An issue was discovered on D-Link DCS-1130 devices. The device provides a user with the capability of setting a SMB folder for the video clippings recorded by the device. It seems that the POST parameters passed in this request (to test if email credentials and hostname sent to the device work properly) result in being passed as commands to a "system" API in the function and thus result in command injection on the device. If the firmware version is dissected using binwalk tool, we obtain a cramfs-root archive which contains the filesystem set up on the device that contains all the binaries. The library "libmailutils.so" is the one that has the vulnerable function "sub_1FC4" that receives the values sent by the POST request. If we open this binary in IDA-pro we will notice that this follows an ARM little endian format. The function sub_1FC4 in IDA pro is identified to be receiving the values sent in the POST request and the value set in POST parameter "receiver1" is extracted in function "sub_15AC" which is then passed to the vulnerable system API call. The vulnerable library function is accessed in "cgibox" binary at address 0x0008F598 which calls the "mailLoginTest" function in "libmailutils.so" binary as shown below which results in the vulnerable POST parameter being passed to the library which results in the command injection issue.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Dlink Dcs-1130 Firmware | ||
| Dlink Dcs-1130 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2017-8404?
The severity of CVE-2017-8404 is critical with a severity value of 9.8.
How does CVE-2017-8404 affect D-Link DCS-1130 devices?
CVE-2017-8404 affects D-Link DCS-1130 devices by allowing an attacker to execute arbitrary commands via a crafted POST request.
What is the impact of CVE-2017-8404?
The impact of CVE-2017-8404 is that it can lead to unauthorized access to sensitive information and the execution of arbitrary commands on the affected device.
Is there a fix available for CVE-2017-8404?
Yes, there are firmware updates available from D-Link to address the vulnerability in the DCS-1130 devices. It is recommended to apply the latest updates to mitigate the risk.
Where can I find more information about CVE-2017-8404?
More information about CVE-2017-8404 can be found in the references provided: [link1], [link2], [link3].
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