ZDI-CAN-15848: (Pwn2Own) Cisco RV340 NGINX Improper Authentication Unrestricted File Upload Vulnerability
This vulnerability allows network-adjacent attackers to create arbitrary files on affected installations of Cisco RV340 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the configuration of the NGINX web server. When parsing the Authorization request header, the server does not properly validate user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this vulnerability to create files in the context of the www-data user.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco RV340W Firmware |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-CAN-15848?
ZDI-CAN-15848 is classified as a high-severity vulnerability due to its ability to allow network-adjacent attackers to create arbitrary files.
How do I fix ZDI-CAN-15848?
To fix ZDI-CAN-15848, update the Cisco RV340 router firmware to the latest version provided by Cisco.
What systems are affected by ZDI-CAN-15848?
ZDI-CAN-15848 affects Cisco RV340 routers, specifically the Cisco RV340W Firmware.
What are the potential impacts of ZDI-CAN-15848?
Exploitation of ZDI-CAN-15848 can lead to unauthorized file creation, potentially compromising the integrity and security of the router.
Is authentication required to exploit ZDI-CAN-15848?
Yes, while authentication is required to exploit ZDI-CAN-15848, the existing mechanism can be bypassed by attackers.
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