ZDI-22-415: (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-22-415?
ZDI-22-415 is rated as a high-severity vulnerability due to the potential for unauthorized file creation by network-adjacent attackers.
How do I fix ZDI-22-415?
To fix ZDI-22-415, you should update your Cisco RV340 router to the latest firmware version provided by Cisco.
Who is affected by ZDI-22-415?
ZDI-22-415 affects installations of Cisco RV340 routers, specifically those running vulnerable firmware.
What is the attack vector for ZDI-22-415?
The attack vector for ZDI-22-415 is network-adjacent access, which allows attackers to exploit the vulnerability when they are on the same local network.
Can ZDI-22-415 be exploited without authentication?
Exploitation of ZDI-22-415 typically requires authentication, but the authentication mechanism can be bypassed.
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