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Advisories

adm-zip through 0.6.1 Duplicate-Entry Validation Bypass via Canonically Equivalent Names

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Severity
medium
Date
Affecting

  • adm-zip <= 0.6.1

CWE
  • CWE-436 Interpretation Conflict
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
Arjun Jain
Description
adm-zip through 0.6.1 contains a duplicate-entry validation bypass that allows attackers to evade the readEntries() check by using canonically equivalent entry names like './hello.txt' and 'hello.txt'. Attackers can craft ZIP archives where getEntry() or readAsText() validates benign content while extractAllTo() writes malicious content to the same path, bypassing integrity checks.

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