Netgear R6400/R6700/R7000/R7850/R7900/R8000/RS400/XR300 1.0.4.84_10.0.58 check_ra Service RAE_Policy.json raePolicyVersion stack-based overflow

Summaryinfo

A vulnerability has been found in Netgear R6400, R6700, R7000, R7850, R7900, R8000, RS400 and XR300 1.0.4.84_10.0.58 and classified as critical. This issue affects some unknown processing of the file RAE_Policy.json of the component check_ra Service. Performing a manipulation of the argument raePolicyVersion results in stack-based overflow. This vulnerability is known as CVE-2020-15636. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in Netgear R6400, R6700, R7000, R7850, R7900, R8000, RS400 and XR300 1.0.4.84_10.0.58 (Wireless LAN Software). This affects an unknown part of the file RAE_Policy.json of the component check_ra Service. The manipulation of the argument raePolicyVersion with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

This vulnerability allows remote attackers to execute arbitrary code on affected installations of NETGEAR R6400, R6700, R7000, R7850, R7900, R8000, RS400, and XR300 routers with firmware 1.0.4.84_10.0.58. Authentication is not required to exploit this vulnerability. The specific flaw exists within the check_ra service. A crafted raePolicyVersion in a RAE_Policy.json file can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-9852.

The weakness was published 08/20/2020 (Website). The advisory is shared at kb.netgear.com. This vulnerability is uniquely identified as CVE-2020-15636 since 07/07/2020. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/20/2020).

By approaching the search of inurl:RAE_Policy.json it is possible to find vulnerable targets with Google Hacking.

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

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Wireless LAN Software

Vendor

• Netgear

Name

• R6400
• R6700
• R7000
• R7850
• R7900
• R8000
• RS400
• XR300

Version

• 1.0.4.84_10.0.58

License

• commercial

Website

• Vendor: https://www.netgear.com/

CPE 2.3info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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