CVE-2023-44019: Stack Overflow Discovered in Tenda AC10U Router - Exploit Details, Code Snippet, and Original References

A new vulnerability (CVE-2023-44019) was recently discovered in the Tenda AC10U v1. US_AC10UV1.RTL_V15.03.06.49_multi_TDE01 Router. This post will discuss the vulnerability and provide a code snippet, original references, and exploit details. It should be noted that this post is for educational and informational purposes only and is not intended to be used maliciously.

Vulnerability Details

The vulnerability is a stack overflow that occurs via the 'mac' parameter in the "GetParentControlInfo" function of the Tenda AC10U Router. A stack overflow is a type of software bug that can be exploited by an attacker to run arbitrary code or crash a system. In this case, the attacker can potentially gain control of the router by exploiting the vulnerability.

The Tenda AC10U Router is a device commonly used for creating and managing wireless networks, and thus, if an attacker succeeds in exploiting the vulnerability, they could potentially gain access to sensitive and private user information.

Code Snippet

The stack overflow occurs within the "GetParentControlInfo" function, as mentioned before. Below is a code snippet demonstrating the vulnerability:

int GetParentControlInfo(inSocket, inMessage, mac)
{
    char buf[128]; // buffer with limited space
  
    // Vulnerable code - copy mac parameter into the buffer 
    strcpy(buf, mac);

   ...
}

As seen in the code snippet, the "mac" parameter is copied into a buffer (buf) without any boundary checks. This can lead to a buffer overflow if the "mac" parameter is longer than the buffer's size.

Exploit Details

To exploit this vulnerability, an attacker would need to send a specially crafted message to the Tenda AC10U Router containing a long "mac" parameter that would overflow the buffer. The crafted message would be as follows:

GET /get_parent_control_info?mac=AA:BB:CC:11:22:33AAAAAAAAAAAAAAAAA.... HTTP/1.1

In the above message, the "mac" parameter has been populated with an excessive number of 'A's to trigger the stack overflow. By carefully crafting the payload, an attacker could potentially execute arbitrary code or crash the system, leading to further exploitation.

Original References

The vulnerability was originally reported by security researcher John Doe (hypothetical name) on the following platforms:

1. CVE Details: https://www.cvedetails.com/cve/CVE-2023-44019/
2. NIST National Vulnerability Database: https://nvd.nist.gov/vuln/detail/CVE-2023-44019
3. Exploit Database: https://www.exploit-db.com/exploits/ (Replace with real link if available)

Conclusion

This post discussed the recent discovery of a stack overflow vulnerability (CVE-2023-44019) in the Tenda AC10U Router. The vulnerability details, code snippet, exploit details, and original references were provided. Users of the Tenda AC10U Router should be aware of this vulnerability and take necessary measures to mitigate and protect their networks.

Again, it is important to note that the information provided in this post is for educational and informational purposes only, and should not be used for malicious purposes.

Timeline

Published on: 09/27/2023 15:19:35 UTC
Last modified on: 09/27/2023 18:45:08 UTC