CVE-2023-34283

NETGEAR RAX30 USB Share Link Following Information Disclosure Vulnerability. This vulnerability allows physically present attackers to disclose sensitive information on affected installations of NETGEAR RAX30 routers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of symbolic links on removable USB media. By creating a symbolic link, an attacker can abuse the routers web server to access arbitrary local files. An attacker can leverage this vulnerability to disclose information in the context of root. Was ZDI-CAN-19498.

Weakness

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Potential Mitigations

• Follow the principle of least privilege when assigning access rights to entities in a software system.
• Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/132.html
• https://cwe.mitre.org/data/definitions/17.html
• https://cwe.mitre.org/data/definitions/35.html
• https://cwe.mitre.org/data/definitions/76.html

References

• https://kb.netgear.com/000065650/Security-Advisory-for-Multiple-Vulnerabilities-on-the-RAX30-PSV-2023-0003-PSV-2023-0004?article=000065650
• https://www.zerodayinitiative.com/advisories/ZDI-23-837/