Shenzhen Tenda Ac9 cgi-bin/luci/request path traversal

Summaryinfo

A vulnerability was found in Shenzhen Tenda Ac9. It has been rated as critical. The impacted element is an unknown function of the file cgi-bin/luci/request. This manipulation causes path traversal. This vulnerability appears as CVE-2017-16936. The attacker needs to be present on the local network. There is no available exploit.

Detailsinfo

A vulnerability classified as critical was found in Shenzhen Tenda Ac9 (version unknown). Affected by this vulnerability is an unknown function of the file cgi-bin/luci/request. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

Directory Traversal vulnerability in app_data_center on Shenzhen Tenda Ac9 US_AC9V1.0BR_V15.03.05.14_multi_TD01, Ac9 ac9_kf_V15.03.05.19(6318_)_cn, Ac15 US_AC15V1.0BR_V15.03.05.18_multi_TD01, Ac15 US_AC15V1.0BR_V15.03.05.19_multi_TD01, Ac18 US_AC18V1.0BR_V15.03.05.05_multi_TD01, and Ac18 ac18_kf_V15.03.05.19(6318_)_cn devices allows remote unauthenticated attackers to read arbitrary files via a cgi-bin/luci/request?op=1&path= URI that uses directory traversal sequences after a /usb/ substring.

The bug was discovered 11/24/2017. The weakness was presented 11/24/2017 (Website). It is possible to read the advisory at github.com. This vulnerability is known as CVE-2017-16936 since 11/24/2017. The exploitation appears to be easy. The attack needs to approached within the local network. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

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

See VDB-109782 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Shenzhen

Name

• Tenda Ac9

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

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

Discussion