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ZERO-CLICK MEDIATEK BUG OPENS PHONES, WI-FI TO TAKEOVERZERO-CLICK MEDIATEK BUG
OPENS PHONES, WI-FI TO TAKEOVER

Critical-rated CVE-2024-20017 allows remote code execution (RCE) on a range of
phones and Wi-Fi access points from a variety of OEMs.

Dark Reading Staff, Dark Reading

September 20, 2024

1 Min Read
Source: Ros Drinkwater via Alamy Stock Photo


A nearly max-critical zero-click vulnerability is impacting MediaTek Wi-Fi
chipsets and driver bundles used in routers and smartphones from various
manufacturers, including Ubiquiti, Xiaomi, and Netgear.

According to SonicWall Capture Labs researchers who found the issue
(CVE-2024-20017, CVSS 9.8), exploitation would open the door to remote code
execution (RCE) without user interaction, making the bug a conduit for easy
device takeover. Making matters worse, a public proof-of-concept exploit (PoC)
recently became available, they warned.



The issue affects MediaTek SDK versions 7.4.0.1 and earlier, as well as OpenWrt
19.07 and 21.02, and affected users should apply the available MediaTek patches
as soon as possible.

In terms of the technical details, the vulnerability is an out-of-bounds write
issue that resides in wappd, a network daemon responsible for configuring and
managing wireless interfaces and access points.

"The architecture of wappd is complex, comprising the network service itself, a
set of local services that interact with the device's wireless interfaces, and
communication channels between components via Unix domain sockets," the
researchers explained in a blog post on the issue this week. "Ultimately, the
vulnerability is a buffer overflow as a result of a length value taken directly
from attacker-controlled packet data without bounds checking and placed into a
memory copy."





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Dark Reading Staff

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