D-Link DCS-1130 GET Parameter command injection

Summaryinfo

A vulnerability was found in D-Link DCS-1130 and classified as critical. The affected element is an unknown function. Executing a manipulation as part of GET Parameter can lead to command injection. This vulnerability is handled as CVE-2017-8408. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in D-Link DCS-1130 (the affected version is unknown). It has been declared as critical. This vulnerability affects an unknown code. The manipulation as part of a GET Parameter leads to a command injection vulnerability. The CWE definition for the vulnerability is CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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 GET parameters passed in this request (to test if SMB 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 binary "cgibox" is the one that has the vulnerable function "sub_7EAFC" that receives the values sent by the GET request. If we open this binary in IDA-pro we will notice that this follows a ARM little endian format. The function sub_7EAFC in IDA pro is identified to be receiving the values sent in the GET request and the value set in GET parameter "user" is extracted in function sub_7E49C which is then passed to the vulnerable system API call.

The weakness was released 07/02/2019 as not defined mailinglist post (Bugtraq). The advisory is shared for download at seclists.org. This vulnerability was named CVE-2017-8408 since 05/02/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/29/2020). The MITRE ATT&CK project declares the attack technique as T1202.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entries connected to this vulnerability are available at VDB-136204, VDB-136205, VDB-136206 and VDB-136207. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• D-Link

Name

• DCS-1130

License

• commercial

Website

• Vendor: https://www.dlink.com/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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