Abode Systems, Inc. iota All-In-One Security Kit versions 6.9X and 6.9Z have been found to contain four format string injection vulnerabilities in the XCMD testWifiAP functionality, as per the Common Vulnerabilities and Exposures (CVE) identifier: CVE-2022-35874. These vulnerabilities can lead to memory corruption, information disclosure, and denial of service after an attacker modifies a configuration value and then executes an XCMD.

In this article, we will provide a detailed overview of these vulnerabilities, including code snippets and original reference links. We will also discuss potential exploits and their impact on affected devices.

Vulnerabilities

These four vulnerabilities are caused by format string injection in the ssid and ssid_hex configuration parameters utilized by the testWifiAP XCMD handler. Specially-crafted configuration values can trigger these vulnerabilities, impacting the stability and security of the device.

Memory Corruption

When an attacker injects a malicious payload into a format string, it can lead to memory corruption by overwriting parts of the memory where crucial data or program control structures are stored. This may cause the program to crash or become unstable, rendering the Abode iota All-In-One Security Kit non-functional.

Information Disclosure

By exploiting these vulnerabilities, an attacker can gain access to sensitive information stored in the device's memory, allowing them to steal data or spy on users. The information disclosed may contain user credentials, configurations, or even keys that are necessary for device communication, leading to a severe privacy breach.

Denial of Service

An attacker can manipulate the configuration values in a way that the device will fail to execute the XCMD properly, leading to a crash or a halt in operation. This results in a denial of service, leaving the user unable to use the Abode iota All-In-One Security Kit until the problem is resolved.

Code Snippet

The following code snippet from the testWifiAP XCMD handler demonstrates the usage of ssid and ssid_hex configuration parameters:

void testWifiAP(char *ssid, char *ssid_hex) {
  printf("Connecting to WiFi AP: %s\n", ssid);
  printf("Connection Configuration (HEX): %s\n", ssid_hex);

  // Perform the desired connection ...

  if (isConnected()) {
    printf("Connection successful to AP: %s\n", ssid);
  } else {
    printf("Failed to connect to AP: %s\n", ssid);
  }
}

In the above code snippet, the printf function is utilized to output diagnostic information. This allows an attacker to inject a format string payload into the configuration value for ssid or ssid_hex and trigger the vulnerability when the testWifiAP XCMD is executed.

For more details on the vulnerabilities and their implications, check out the following resources

1. CVE-2022-35874 - The official CVE entry that widely reports the vulnerabilities.
2. Abode Systems Official Website - The official website of the IoT product's vendor, Abode Systems Inc.

Exploit Details

Potential exploitation of these vulnerabilities involves an attacker gaining access to the device's administration interface or using another method to modify the configuration values of ssid and ssid_hex. Once the attacker injects the malicious payload, they can execute the testWifiAP XCMD to trigger the vulnerability, causing memory corruption, information disclosure, or denial of service.

Conclusion

Abode Systems, Inc. iota All-In-One Security Kit 6.9X and 6.9Z are susceptible to four format string injection vulnerabilities, as identified in CVE-2022-35874. These vulnerabilities can be exploited to cause memory corruption, information disclosure, or denial of service by injecting malicious payloads into the ssid and ssid_hex configuration parameters utilized by the testWifiAP XCMD handler. To protect the security and stability of the affected devices, IoT security best practices and timely patching of the devices' firmware or software should be followed.

Timeline

Published on: 10/25/2022 17:15:00 UTC
Last modified on: 10/28/2022 01:28:00 UTC