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Sources : US Cert, Cert EU, Cert FR, Cnil, VulDB.

dimanche 28 octobre 2018

Tenda AC9/AC18 POST Request __fastcall usbName privilege escalation

A vulnerability was found in Tenda AC9 and AC18 (the affected version is unknown). It has been rated as critical. Affected by this issue is the function __fastcall of the component POST Request Handler. The manipulation of the argument usbName with an unknown input leads to a privilege escalation vulnerability (Shell). Using CWE to declare the problem leads to CWE-269. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered on Tenda AC9 V15.03.05.19(6318)_CN, AC15 V15.03.05.19_CN, and AC18 V15.03.05.19(6318)_CN devices. They allow remote code execution via shell metacharacters in the usbName field to the __fastcall function with a POST request.

The weakness was shared 10/28/2018. This vulnerability is handled as CVE-2018-18728 since 10/27/2018. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/29/2018).

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

CPE

CVSSv3

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

VulDB Base Score: ≈5.5
VulDB Temp Score: ≈5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploiting

Class: Privilege escalation / Shell (CWE-269)
Local: Yes
Remote: No

Availability: No

Price Prediction: 🔍
Current Price Estimation: 🔒

Threat Intelligence

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Actions: 🔍

Countermeasures

Recommended: no mitigation known
0-Day Time: 🔒

Timeline

10/27/2018 CVE assigned
10/28/2018 Advisory disclosed
10/29/2018 VulDB entry created
10/29/2018 VulDB last update

Sources

CVE: CVE-2018-18728 (🔒)

Entry

Created: 10/29/2018
Complete: 🔍

Lien vers l'article source

Auteur: VulDB

Catégories: VulDBNombre de vues: 236

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