uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation

The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

输入验证不恰当

uutils coreutils 输入验证错误漏洞

uutils coreutils是Uutils开源的一个跨平台核心命令行工具集。 uutils coreutils存在输入验证错误漏洞，该漏洞源于comm实用程序在执行比较操作之前错误地从非常规文件输入中消耗数据，are_files_identical函数打开并读取两个输入路径以比较内容，而未首先验证路径是否引用常规文件，如果输入路径是FIFO或管道，此预读操作会耗尽流，导致在实际比较逻辑执行之前静默数据丢失，此外，如果尝试从无限流预读，实用程序可能无限期挂起。

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