7.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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CVE-2023-39139

CVE-2023-39139: Path traversal in Archive

An issue in Archive v3.3.7 allows attackers to execute a path traversal via extracting a crafted zip file.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2023-39139

CVE-2023-39139:

7.8

CVSS Score

3.1

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
archive	pub	<= 3.3.7	3.3.8

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stemmed from improper symlink validation in archive extraction logic. The original code checked for absolute paths and '..' prefixes in symlink targets (nameOfLinkedFile), but didn't account for cases where relative paths could be combined with parent directory locations to escape the output path. The patch introduced _isValidSymLink which properly resolves and checks the full path using path normalization and isWithin checks. Both extractArchiveToDisk and extractFileToDisk contained the vulnerable validation pattern before the patch, as shown in the commit diff where the old checks (startsWith '/' or '..') were replaced with the new validation function.

Vulnerable functions

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Vulnerability Intelligence
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WAF Protection Rules

WAF Rule

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Reasoning

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