uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

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

检查时间与使用时间(TOCTOU)的竞争条件

uutils coreutils 安全漏洞

uutils coreutils是Uutils开源的一个跨平台核心命令行工具集。 uutils coreutils存在安全漏洞，该漏洞源于跨设备操作期间存在竞争条件，可能导致本地攻击者通过符号链接重定向写入，用源内容覆盖任意目标文件。

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