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Advisories

Tencent AI-Infra-Guard skill-scan Analysis Bypass via Excluded Python Bytecode

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severity
high
date
Affecting

  • AI-Infra-Guard >= 0, < 4.5.2

  • AI-Infra-Guard <= 4.6.0

  • aig-skill-scan <= 0.2.1

CWE
  • CWE-693 Protection Mechanism Failure
CVSS
7.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
nedlir
Description
Tencent AI-Infra-Guard's skill-scan component excludes compiled Python bytecode files from analysis by hardcoding __pycache__ directories and .pyc/.pyo/.pyd extensions into skip lists across multiple scanning surfaces. Attackers can distribute skills with benign Python source files alongside malicious compiled bytecode that executes on import while the scanner reports a safe verdict, enabling code execution when operators install the skill.

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