ZyXEL NBG6716 V1.00(AAKG.9)C0 ozkerz popen beginIndex/endIndex command injection

Summaryinfo

A vulnerability was found in ZyXEL NBG6716 V1.00(AAKG.9)C0 and classified as critical. Affected is the function popen of the component ozkerz. Such manipulation of the argument beginIndex/endIndex leads to command injection. This vulnerability is listed as CVE-2017-15226. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ZyXEL NBG6716 V1.00(AAKG.9)C0 (Router Operating System). Affected by this issue is the function popen of the component ozkerz. The manipulation of the argument beginIndex/endIndex with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Zyxel NBG6716 V1.00(AAKG.9)C0 devices allow command injection in the ozkerz component because beginIndex and endIndex are used directly in a popen call.

The bug was discovered 10/06/2017. The weakness was presented 10/10/2017 (Website). The advisory is available at secarma.co.uk. This vulnerability is handled as CVE-2017-15226 since 10/10/2017. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 11/23/2019). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 4 days. During that time the estimated underground price was around $5k-$25k.

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

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Productinfo

Type

• Router Operating System

Vendor

• ZyXEL

Name

• NBG6716

Version

• V1.00(AAKG.9)C0

License

• commercial

Website

• Vendor: https://www.zyxel.com/

CPE 2.3info

• 🔍

CPE 2.2info

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