CVE-2024-4248 Tenda i21 formQosManage_user stack-based overflow

High 8.8 Published 27 Apr 2024 Updated 1 Aug 2024

Remote attackers can trigger a stack-based buffer overflow in the Tenda i21 router via the ssidIndex parameter, potentially leading to code execution.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2024-4248?

CVE-2024-4248 is a high-severity memory corruption vulnerability in Tenda i21, published on 27 Apr 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was found in Tenda i21 1.0.0.14(4656) and classified as critical. This issue affects the function formQosManage_user. The manipulation of the argument ssidIndex leads to stack-based buffer overflow. The attack may be initiated remotely. The associated identifier of this vulnerability is VDB-262139. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-787, CWE-121

Which versions are affected by CVE-2024-4248?

It affects 1 product.

Products include Tenda I21 Firmware.

How do I fix CVE-2024-4248?

No fix has been published for CVE-2024-4248 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2024-4248 being exploited?

There is no known exploitation of CVE-2024-4248 in the wild and no public exploit code.

Sources

Also known as GHSA-j9wm-c67x-v933.