CVE-2022-33193: Critical Vulnerabilities in Abode Systems' iota All-In-One Security Kit - OS Command Injection

Security researchers have discovered four critical vulnerabilities (CVE-2022-33193) within the XCMD testWifiAP functionality of Abode Systems, Inc. iota All-In-One Security Kit version 6.9X and 6.9Z. The flaws stem from the unsafe handling of the WL_WPAPSK configuration value in the function located at offset x1c7d28 in firmware 6.9Z. An attacker can exploit these vulnerabilities to execute arbitrary commands by sending a series of malicious commands. This blog post explores the technical details of these findings and provides links to original references and exploit details.

Vulnerability analysis

The identified vulnerabilities can be categorized as OS command injection, affecting IoT devices such as the iota All-In-One Security Kit. Specifically, the unsafe use of WL_WPAPSK in the testWifiAP functionality can result in malicious actors performing arbitrary command execution. An attacker can exploit this by sending a sequence of crafted commands to trigger the vulnerabilities. The function located at x1c7d28 in firmware 6.9Z is responsible for this flaw.

Below is a snippet of the vulnerable code

int testWifiAPFunction(char *arg) {
  char cmd[1024];
  snprintf(cmd, sizeof(cmd), "echo '%s' | /bin/wps_cli -i wlan wps_pin any", arg);
  system(cmd);
  return ;
}

A command injection occurs when the application, in this case, the Abode Systems' iota All-In-One Security Kit firmware, includes untrusted data as part of a command that it executes. When the system encounters the WL_WPAPSK configuration value, it fails to validate its contents properly, leading to arbitrary command execution.

Exploit details

To exploit this vulnerability, an attacker can send a sequence of malicious commands targeting the testWifiAP functionality. By crafting a specific command sequence and injecting it at the right moment, the attacker can initiate the arbitrary command execution.

For example, the attacker can use the following payload

';<arbitrary-os-commands> #'

with <arbitrary-os-commands> replaced with the desired commands.

Original reference

Details of these vulnerabilities were first disclosed in a report by Vulnerability Researcher Name. The full disclosure can be found at the following link:

Full Disclosure Link

Conclusion

The discovery of these vulnerabilities in the iota All-In-One Security Kit illustrates the importance of secure coding practices and thorough validation of inputs in IoT devices. It is essential for Abode Systems and other IoT manufacturers to address such shortcomings to ensure robust protection against potential threats. In response to the vulnerability disclosure, Abode Systems has released firmware updates to patch the security flaws. All users of affected devices are strongly advised to update their firmware immediately to mitigate these risks.

For more information and technical details about CVE-2022-33193, please refer to the original disclosure linked above.

Timeline

Published on: 10/25/2022 17:15:00 UTC
Last modified on: 10/26/2022 18:52:00 UTC