Cisco RV340 set_snmp usmUserPrivKey Command Injection Remote Code Execution Vulnerability
Vulnerability Details
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 usmUserPrivKey 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.
Additional Details
Cisco has issued an update to correct this vulnerability. More details can be found at:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sb-rv34x-rce-8bfG2h6b
Disclosure Timeline
- 2021-01-05 - Vulnerability reported to vendor
- 2021-05-11 - Coordinated public release of advisory
Credit
T Shiomitsu
