uutils coreutils cp Information Disclosure via Time-of-Check to Time-of-Use Symlink Swap

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability in the cp utility of uutils coreutils allows an attacker to bypass no-dereference intent. The utility checks if a source path is a symbolic link using path-based metadata but subsequently opens it without the O_NOFOLLOW flag. An attacker with concurrent write access can swap a regular file for a symbolic link during this window, causing a privileged cp process to copy the contents of arbitrary sensitive files into a destination controlled by the attacker.

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

检查时间与使用时间(TOCTOU)的竞争条件

uutils coreutils 后置链接漏洞

uutils coreutils是Uutils开源的一个跨平台核心命令行工具集。 uutils coreutils存在后置链接漏洞，该漏洞源于存在竞争条件，可能导致攻击者绕过无解引用意图，使特权cp进程将任意敏感文件内容复制到攻击者控制的目标位置。

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