Researchers warn about severe bug affecting Realtek Wi-Fi modules

A brand new set of vital vulnerabilities has been disclosed within the Realtek RTL8170C Wi-Fi module that an adversary can abuse to realize elevated privileges on the system and hijack wi-fi communications.

Researchers from Israeli IoT safety agency Vdoo stated in an article, “Profitable exploits would result in full management of the Wi-Fi module and probably root entry to the OS (reminiscent of Linux or Android) of an embedded system that makes use of this module.” ” Revealed yesterday.

The Realtek RTL8710C Wi-Fi SoC, Amoeba, is an Arduino-compatible programmable platform, from peripheral interfaces to constructing varied IoT purposes by gadgets spanning the agricultural, automotive, power, healthcare, industrial, safety and good dwelling sectors. is provided.

Cyber ​​security

The flaw impacts all embedded and IoT gadgets that use the part to hook up with Wi-Fi networks and requires an attacker to be on the identical Wi-Fi community because the system or community that makes use of the RTL8710C module. Know Pre-Shared Key (PSK), because the title implies, is a cryptographic secret used to authenticate wi-fi shoppers on an area space community.

The findings observe an earlier evaluation in February that discovered related vulnerabilities within the Realtek RTL8195A Wi-Fi module, chief amongst them the buffer overflow vulnerability (CVE-2020-9395) that enables an attacker to be in shut proximity of the RTL8195 module. Permits to take utterly. On the module with out realizing the Wi-Fi community password.

Equally, the WPA2 four-way handshake mechanism of the RTL8170C Wi-Fi module is susceptible to 2 stack-based buffer overflow vulnerabilities (CVE-2020-27301 and CVE-2020-27302, CVSS rating: 8.0) which will misuse the attacker’s information. We do. of PSK to realize distant code execution on WPA2 shoppers that use this Wi-Fi module.

Cyber ​​security

As a attainable real-world assault state of affairs, the researchers demonstrated a proof-of-concept (PoC) exploit, during which the attacker masquerades as a reliable entry level and sends any consumer (aka the provider) a malicious Sends an encrypted Group Temporal Key (GTK). Connects to it through the WPA2 protocol. A gaggle non permanent secret is used to safe all multicast and broadcast visitors.

Vdoo stated there aren’t any identified assaults working to take advantage of the vulnerabilities, including that firmware variations launched after January 11, 2021 embody mitigations that tackle the difficulty. The corporate additionally recommends utilizing a “robust, personal WPA2 passphrase” to stop exploits of the above points in eventualities the place the system’s firmware can’t be up to date.

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