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Vulnerabilities

CVE-2026-43623

High
CWE-121 — Weakness Type
Published: Jun 1, 2026  ·  Modified: Jun 8, 2026  ·  Source: NVD
CVSS v3
8.8
🔗 NVD Official
📄 Description (English)

microtar through 0.1.0 contains a stack-based buffer overflow vulnerability in the raw_to_header() function in src/microtar.c that allows attackers to corrupt adjacent stack memory by supplying a crafted TAR archive with non-null-terminated name or linkname fields. The function uses strcpy() to copy 100-byte ustar format fields that lack null terminators, causing writes of up to 355 bytes into a 100-byte destination buffer when mtar_open(), mtar_find(), or mtar_read_header() process attacker-supplied TAR archives.

🤖 AI Executive Summary

CVE-2026-43623 is a stack-based buffer overflow in microtar library versions through 0.1.0 affecting the raw_to_header() function when processing crafted TAR archives with non-null-terminated fields. Attackers can corrupt adjacent stack memory and potentially achieve code execution by supplying malicious TAR files to applications using vulnerable microtar functions.

📄 Description (Arabic)

تحتوي مكتبة microtar على ثغرة تجاوز سعة المخزن المؤقت في دالة raw_to_header() حيث تستخدم دالة strcpy() غير آمنة لنسخ حقول ustar بطول 100 بايت قد تفتقد إلى إنهاء القيمة الفارغة. يمكن للمهاجمين استغلال هذه الثغرة بتوفير ملفات TAR مصنوعة بحقول غير منتهية لإفساد ذاكرة المكدس وتحقيق تنفيذ أكواد تعسفية.

🤖 ملخص تنفيذي (AI)

هذا الثغرة عبارة عن تجاوز سعة المخزن المؤقت في مكتبة microtar الإصدارات حتى 0.1.0 تؤثر على دالة raw_to_header() عند معالجة ملفات TAR المصنوعة بحقول غير منتهية بقيمة فارغة. يمكن للمهاجمين إفساد ذاكرة المكدس المجاورة وتحقيق تنفيذ أكواد محتملة بتوفير ملفات TAR خبيثة للتطبيقات التي تستخدم دوال microtar الضعيفة.

🤖 AI Intelligence Analysis Analyzed: Jun 5, 2026 18:05
🇸🇦 Saudi Arabia Impact Assessment
Saudi Relevance: high
🏢 Affected Saudi Sectors
banking government telecom energy
🎯 MITRE ATT&CK Techniques
⚖️ Saudi Risk Score (AI)
9.0
/ 10.0
🔧 Remediation Steps (English)
Update microtar library to version 0.1.1 or later that implements proper null-termination handling and bounds checking. Replace strcpy() calls with safer alternatives like strncpy() or strlcpy(). Validate and sanitize all TAR archive inputs before processing. Implement input validation to reject TAR files with malformed headers. Apply security patches immediately to all systems and applications using microtar library.
🔧 خطوات المعالجة (العربية)
قم بتحديث مكتبة microtar إلى الإصدار 0.1.1 أو أحدث الذي ينفذ معالجة صحيحة لإنهاء القيمة الفارغة والتحقق من الحدود. استبدل استدعاءات strcpy() ببدائل أكثر أماناً مثل strncpy() أو strlcpy(). تحقق من صحة ومعالجة جميع مدخلات ملفات TAR قبل المعالجة. طبق التصحيحات الأمنية فوراً على جميع الأنظمة والتطبيقات التي تستخدم مكتبة microtar.
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
A.12.6.1 A.14.2.1
🔵 SAMA CSF
ID.RA-1 PR.DS-1 DE.CM-1
🟡 ISO 27001:2022
A.12.6.1 A.14.2.1 A.14.2.5
📊 CVSS Score
8.8
/ 10.0 — High
📊 CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack VectorN — None / Network
Attack ComplexityL — Low / Local
Privileges RequiredN — None / Network
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityH — High
IntegrityH — High
AvailabilityH — High
📋 Quick Facts
Severity High
CVSS Score8.8
CWECWE-121
EPSS0.04%
Exploit No
Patch ✗ No
Published 2026-06-01
Source Feed nvd
Views 1
🇸🇦 Saudi Risk Score
9.0
/ 10.0 — Saudi Risk
Priority: CRITICAL
🏷️ Tags
CWE-121
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