Critical Linux Kernel Bug Allows Remote Takeover>

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A critical Linux kernel bug (CVE-2021-43267) exists in a TIPC message type that allows Linux nodes to send cryptographic keys to each other, and could allow remote takeover.

A critical heap-overflow security vulnerability in the Transparent Inter Process Communication (TIPC) module of the Linux kernel could allow local exploitation and remote code execution, leading to full system compromise.

TIPC is a peer-to-peer protocol used by nodes within a Linux cluster to communicate with each other in an optimized way; it enables various types of messages that are used for different purposes. According to SentinelOne’s SentinelLabs, the bug in question (CVE-2021-43267) specifically resides in a message type that allows nodes to send cryptographic keys to each other. When received, the keys can be used to decrypt further communications from the sending node.

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