External risk intelligence

Tenda i29 Command Injection Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2023-50983

The product is a Tenda i29 wireless access point. Network infrastructure devices such as access points and routers are commonly deployed with management interfaces reachable over the network, and this vulnerability involves a function that may be exposed via the device's web management interface.

Command Injection

Tenda I29 Firmware

1.0.0.21.0.0.5

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

This advisory highlights a critical command injection vulnerability found in Tenda i29 network devices. This flaw, if exploited, could allow an attacker to execute arbitrary commands remotely, potentially leading to unauthorized access and control of the affected devices.

  • Flaw allows remote command execution.
  • Network devices are common targets.
  • Confirm relevance and assess exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending a specially crafted request to the affected device over the network. This request would target the `sysScheduleRebootSet` function, which is likely exposed through the device's management interface. If successful, the attacker could inject arbitrary commands, potentially leading to a complete compromise of the device.

  • No authentication or user interaction needed.
  • Triggered by sending a malicious request.
  • Allows arbitrary command execution.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated attacker to execute arbitrary commands on the affected device when its schedule reboot function is called. This could lead to a compromise of the device's integrity and potentially allow unauthorized access to network traffic.

  • Device command execution
  • Via unauthenticated network requests
  • Compromise of device and network access

Operational Fix

Recommended remediation, mitigation, and detection steps

The Tenda i29 wireless access point is susceptible to command injection, an issue likely impacting network infrastructure teams responsible for device management and security. The initial focus should be on identifying all deployed i29 devices, assessing their network exposure and criticality, and locating the accountable owner. Subsequently, a risk-based remediation plan, potentially involving vendor coordination or temporary mitigation, should be developed.

  • Network and security teams own the issue.
  • Verify device network exposure and criticality.
  • Plan remediation based on risk assessment.

Supplementary metadata

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Frequently asked questions

What is the Tenda i29?

The Tenda i29 is a wireless access point designed to provide network connectivity in home or office environments. It functions as a bridge between wireless devices and the wired network, managing traffic flow and device authentication. Because these units are foundational pieces of infrastructure, they often include web-based management interfaces that allow administrators to configure settings and maintain system health remotely.

What does command injection mean for CVE-2023-50983?

This vulnerability is classified as CWE-77, or Improper Neutralization of Special Elements used in an OS Command. Essentially, the device fails to properly sanitize input before processing it. In the context of this CVE, an attacker can input malicious system commands into the sysScheduleRebootSet function, which the device then incorrectly executes with elevated privileges as if they were legitimate system instructions.

How is this vulnerability triggered?

An attacker triggers this flaw by sending a specially crafted, unauthenticated network request directly to the device's management interface. The vulnerability resides specifically within the code handling the scheduled reboot function. Simply interacting with the device's public-facing Wi-Fi signal or browsing through standard network traffic does not trigger the bug; it requires a targeted request directed at the management service.

Why does Halo Surface Signal categorize this as external?

Halo Surface Signal flags this as external because the Tenda i29 is a network infrastructure device. These units are frequently deployed in ways where management interfaces become reachable over the network. If your i29 interface is accessible from outside your local network, the risk increases significantly, as the vulnerability does not require any prior authentication or user interaction to succeed.

What steps should I take if I use Tenda i29 devices?

Your first step is to create an inventory of all Tenda i29 units within your environment. Once identified, verify whether their web management interfaces are exposed to the public internet or untrusted network segments. If exposure is found, prioritize restricting access to these management interfaces to internal, trusted networks only, and contact the vendor to determine if a firmware update or alternative configuration change is available to resolve the flaw.

References