ZDI-21-558: Cisco RV340 set_snmp usmUserAuthKey Command Injection Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Cisco RV340 routers. Authentication is required to exploit this vulnerability. The specific flaw exists within the processing of JSON-RPC requests. When parsing the usmUserAuthKey property, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code 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-21-558?
The severity of ZDI-21-558 is classified as high due to its potential for remote code execution.
How do I fix ZDI-21-558?
To fix ZDI-21-558, ensure that you update your Cisco RV340 router to the latest firmware version provided by Cisco.
Who is affected by ZDI-21-558?
ZDI-21-558 affects installations of Cisco RV340 routers that are running vulnerable firmware.
Can ZDI-21-558 be exploited without authentication?
No, exploitation of ZDI-21-558 requires authentication to the affected Cisco RV340 router.
What type of attack is associated with ZDI-21-558?
ZDI-21-558 is associated with network-adjacent code execution attacks.
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