Netgear RAX30 rex_cgi JSON Parser stack-based overflow

Summaryinfo

A vulnerability marked as critical has been reported in Netgear RAX30. This impacts an unknown function of the component rex_cgi JSON Parser. The manipulation leads to stack-based overflow. This vulnerability is traded as CVE-2023-27361. Access to the local network is required for this attack to succeed. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Netgear RAX30 (Wireless LAN Software) (the affected version is unknown). This issue affects an unknown code of the component rex_cgi JSON Parser. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to 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). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

NETGEAR RAX30 rex_cgi JSON Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR RAX30 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the handling of JSON data. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-19355.

The weakness was shared 05/02/2023. It is possible to read the advisory at zerodayinitiative.com. The identification of this vulnerability is CVE-2023-27361 since 02/28/2023. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/03/2025).

Upgrading eliminates this vulnerability. The upgrade is hosted for download at kb.netgear.com.

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Productinfo

Type

• Wireless LAN Software

Vendor

• Netgear

Name

• RAX30

License

• commercial

Website

• Vendor: https://www.netgear.com/

CPE 2.3info

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CPE 2.2info

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