CVE-2026-29518

描述

Rsync versions before 3.4.3 contain a time-of-check to time-of-use (TOCTOU) race condition in daemon file handling that allows attackers to redirect file writes outside intended directories by replacing parent directory components with symbolic links. Attackers with write access to a module path can exploit this race condition to create or overwrite arbitrary files, potentially modifying sensitive system files and achieving privilege escalation when the daemon runs with elevated privileges. This vulnerability can only be triggered if the chroot setting is false.

如何修補 CVE-2026-29518

要修補 CVE-2026-29518,請將受影響套件升級到下列已修補版本。

• —升級至 3.4.3-r0 或更新版本
• —升級至 3.2.3-4+deb11u4 或更新版本

CVE-2026-29518 正在被利用嗎?

低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 3.4.3-r0
• from 0, < 3.2.3-4+deb11u4

CVSS 分數

參考連結(2)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2026-29518
• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2026-29518