External risk intelligence

Cisco RV Routers: Command Execution Risk

CVE advisoryKnown Exploit

CVE-2019-1652

Cisco RV routers with administrative access are vulnerable to command execution. An attacker can exploit this by sending malicious requests to the web interface, potentially gaining root-level control. This poses a risk to device integrity and network access. Organizations should apply vendor-provided firmware updates.

4Halo Surface Signal

OS Command Injection

Cisco Rv320 Firmware

1.4.2.15 to before 1.4.2.22

External exposure likelihood

Halo Surface Signal score for CVE-2019-1652

The vulnerability affects the web-based management interface of VPN routers. While management interfaces are ideally internal, these devices function as edge gateways and are commonly deployed in configurations where their management portals are exposed to the internet or are reachable via remote access services.

Horizon Alert

Summary of the vulnerability and why it matters

The web-based management interface of certain Cisco routers contains a flaw that could allow an attacker to execute commands on the underlying system. This vulnerability stems from inadequate validation of input provided by users. An attacker could leverage this by sending specially crafted requests to the router's management interface, potentially gaining the ability to run commands with root privileges on the device.

  • Affected Cisco router management interfaces
  • Improper input validation allows command execution
  • Compromise of device and network access

Attack Path

How an attacker could exploit the issue

An attacker with administrative privileges can exploit this vulnerability to gain control of affected Cisco routers. The attack involves sending specially crafted requests to the device's web management interface. Successful exploitation allows an attacker to execute arbitrary commands with root-level privileges on the router's operating system. This could lead to significant disruption of network services and potential data compromise.

  • Affected devices are exposed via their web management interface.
  • An authenticated administrator is the attacker.
  • Malicious requests lead to arbitrary command execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an attacker to execute arbitrary commands on affected Cisco routers. The attack requires administrative privileges on the device and involves sending malicious requests to the web interface. Successful exploitation could lead to the complete compromise of the device, allowing the attacker to control it and potentially access or disrupt network traffic. Organizations using these routers should treat this as a high-priority issue.

  • Likely attacker skill level: Moderate
  • Required access or conditions: Administrative privileges
  • Business risk or urgency: High

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

An organization should address a vulnerability in Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers that allows authenticated attackers with administrative privileges to execute arbitrary commands. This could lead to unauthorized command execution with root privileges on the underlying Linux shell. Cisco has provided firmware updates to resolve this issue.

  • Identify all affected router assets.
  • Reduce exposure or isolate risk.
  • Apply vendor fix, verify, and monitor.

Frequently asked questions

What kind of Cisco routers are affected by the command injection vulnerability?

The vulnerability affects Cisco Small Business RV320 and RV325 Dual Gigabit WAN VPN Routers. Specifically, the web-based management interface of these devices is impacted.

How can an attacker exploit this vulnerability in Cisco RV routers?

An attacker with administrative privileges can exploit this by sending malicious HTTP POST requests to the web-based management interface of an affected device. This is due to improper validation of user-supplied input.

What is the potential impact of a successful exploit on Cisco RV routers?

A successful exploit allows the attacker to execute arbitrary commands on the underlying Linux shell with root privileges, leading to a potential compromise of the device and network.

Is there a known exploitation of Cisco RV320 and RV325 routers that requires vendor action?

Yes, Cisco has released firmware updates that address this vulnerability in the RV320 and RV325 Dual Gigabit WAN VPN Routers. Applying these updates is the recommended action.

What steps should an organization take to mitigate this Cisco router vulnerability?

Organizations should identify all affected router assets, reduce exposure or isolate the risk if possible, and then apply the vendor-provided firmware updates to resolve the issue. Continuous monitoring after applying the fix is also advised.

References