D-Link DIR-600 v2.x model/__show_info.php Password path traversal

Summaryinfo

A vulnerability was found in D-Link DIR-600 v2.x. It has been classified as problematic. Affected is an unknown function of the file model/__show_info.php. The manipulation leads to path traversal (Password). This vulnerability is uniquely identified as CVE-2017-12943. The attack is possible to be carried out remotely. Moreover, an exploit is present.

Detailsinfo

A vulnerability was found in D-Link DIR-600 v2.x (Router Operating System) and classified as problematic. This issue affects an unknown code block of the file model/__show_info.php. The manipulation with an unknown input leads to a path traversal vulnerability (Password). Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

D-Link DIR-600 Rev Bx devices with v2.x firmware allow remote attackers to read passwords via a model/__show_info.php?REQUIRE_FILE= absolute path traversal attack, as demonstrated by discovering the admin password.

The bug was discovered 08/06/2017. The weakness was disclosed 08/18/2017 (Website). It is possible to read the advisory at youtube.com. The identification of this vulnerability is CVE-2017-12943 since 08/18/2017. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 12 days. During that time the estimated underground price was around $5k-$25k. By approaching the search of inurl:model/__show_info.php it is possible to find vulnerable targets with Google Hacking. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43558 (D-Link Router DIR-600 Authentication Bypass Vulnerability).

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

The vulnerability is also documented in the vulnerability database at Exploit-DB (42581). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• D-Link

Name

• DIR-600

Version

• v2.x

License

• commercial

Website

• Vendor: https://www.dlink.com/

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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