A vulnerability classified as critical was found in Netgear AC1200 R6220 1.1.0.86. This vulnerability affects an unknown function of the component Path String Handler. The manipulation as part of a NULL Byte leads to a poison null byte vulnerability. The CWE definition for the vulnerability is CWE-626. The product does not properly handle null bytes or NUL characters when passing data between different representations or components. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR AC1200 R6220 Firmware version 1.1.0.86 Smart WiFi Router. Authentication is not required to exploit this vulnerability. The specific flaw exists within the processing of path strings. By inserting a null byte into the path, the user can skip most authentication checks. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-8616.

The weakness was disclosed 02/10/2020. This vulnerability was named CVE-2019-17137 since 10/04/2019. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 02/11/2020).

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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Vendor

• Netgear

Name

• AC1200 R6220

Version

• 1.1.0.86

License

• commercial

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