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Vulnerabilities

CVE-2026-29518

High
CWE-367 — Weakness Type
Published: May 20, 2026  ·  Modified: May 26, 2026  ·  Source: NVD
CVSS v3
7.0
🔗 NVD Official
📄 Description (English)

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.

🤖 AI Executive Summary

Rsync versions before 3.4.3 contain a TOCTOU race condition in daemon file handling that allows attackers with write access to redirect file writes outside intended directories using symbolic links. This can lead to arbitrary file creation/overwriting and privilege escalation when the daemon runs with elevated privileges and chroot is disabled.

📄 Description (Arabic)

يؤثر هذا الثغر على خوادم Rsync التي تعمل مع تعطيل إعداد chroot، مما يسمح للمهاجمين بالاستفادة من حالة تسابق بين فحص الملف واستخدامه. يمكن للمهاجمين الذين لديهم وصول للكتابة إلى مسار الوحدة استبدال مكونات الدليل الأب برابط رمزي لإعادة توجيه الملفات إلى مواقع عشوائية. قد يؤدي هذا إلى تعديل ملفات النظام الحساسة وتصعيد الامتيازات إذا كان الخادم يعمل بامتيازات مرتفعة.

🤖 ملخص تنفيذي (AI)

إصدارات Rsync السابقة للإصدار 3.4.3 تحتوي على حالة تسابق TOCTOU في معالجة ملفات الخادم تسمح للمهاجمين بإعادة توجيه عمليات كتابة الملفات خارج الدلائل المقصودة باستخدام الروابط الرمزية. يمكن أن يؤدي هذا إلى إنشاء أو الكتابة فوق ملفات عشوائية وتصعيد الامتيازات عندما يعمل الخادم بامتيازات مرتفعة و chroot معطل.

🤖 AI Intelligence Analysis Analyzed: May 21, 2026 23:40
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking telecom energy government healthcare
⚖️ Saudi Risk Score (AI)
7.0
/ 10.0
🔧 Remediation Steps (English)
Upgrade Rsync to version 3.4.3 or later immediately. Enable chroot setting in Rsync daemon configuration to prevent exploitation. Restrict write access to module paths to trusted users only. Monitor file system changes in Rsync module directories for suspicious symbolic link creation.
🔧 خطوات المعالجة (العربية)
قم بترقية Rsync إلى الإصدار 3.4.3 أو أحدث فوراً. فعّل إعداد chroot في تكوين خادم Rsync لمنع الاستغلال. قيّد الوصول للكتابة إلى مسارات الوحدات للمستخدمين الموثوقين فقط. راقب التغييرات في نظام الملفات في دلائل وحدات Rsync للكشف عن إنشاء روابط رمزية مريبة.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.8.1.1 A.8.1.2 A.8.1.3 A.8.1.4 A.12.4.1
🔵 SAMA CSF
ID.BE-1 PR.AC-1 PR.AC-3 PR.AC-6 PR.PT-2
🟡 ISO 27001:2022
A.5.1.1 A.6.1.1 A.6.2.1 A.8.1.1 A.8.1.2 A.8.1.3 A.8.1.4 A.12.4.1 A.14.2.1
📦 Affected Products / CPE 1 entries
samba:rsync
📊 CVSS Score
7.0
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack VectorL — Low / Local
Attack ComplexityH — High
Privileges RequiredL — Low / Local
User InteractionN — None / Network
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score7.0
CWECWE-367
EPSS0.01%
Exploit No
Patch ✓ Yes
Published 2026-05-20
Source Feed nvd
🇸🇦 Saudi Risk Score
7.0
/ 10.0 — Saudi Risk
Priority: HIGH
🏷️ Tags
patch-available CWE-367
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