Cisco Small Business RV Series Routers Management Interface Remote Command Execution and Denial of Service Vulnerabilities

Vulnerability

Multiple buffer overflow vulnerabilities exist in the web-based management interface of Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers [1]. These vulnerabilities are due to improper validation of user-supplied input in the web-based management interface. An authenticated remote attacker could exploit these vulnerabilities by sending crafted HTTP requests to an affected device [1]. No specific configuration beyond standard management interface access is required for the vulnerable code path to be reachable. The affected firmware versions are those prior to the fixed releases specified by Cisco [1].

Exploitation

An attacker must have valid administrator credentials on the affected device to exploit these vulnerabilities [1]. The attacker sends a specially crafted HTTP request to the web-based management interface of the router [1]. No user interaction is required beyond the attacker's own actions. The attack is performed over the network, and the attacker does not need physical access [1].

Impact

A successful exploit could allow the attacker to execute arbitrary code as the root user on the underlying operating system or cause the device to reload, resulting in a denial of service (DoS) condition [1]. This gives the attacker full control over the device's operating system and the ability to disrupt network services [1].

Mitigation

Cisco has released free software updates to address these vulnerabilities [1]. The fixed releases are specified in the Cisco Security Advisory [1]. There are no workarounds that mitigate these vulnerabilities [1]. Customers are advised to upgrade to the fixed firmware versions as soon as possible [1].