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Advisories

picklescan - Universal Blocklist Bypass via pkgutil.resolve_name

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severity
critical
date
Affecting

  • picklescan >= 0, < 1.0.4

CWE
  • CWE-183 Permissive List of Allowed Inputs
CVSS
10.0
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Credit
yash2998chhabria
Description
picklescan before 1.0.4 fails to block pkgutil.resolve_name, allowing attackers to bypass the entire blocklist by resolving any dangerous function through indirect REDUCE calls. Remote attackers can invoke any blocked function such as os.system, builtins.exec, or subprocess.call to achieve remote code execution.

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