CVE-2022-26184

Poetry v1.1.9 and below on Windows: Untrusted search path vulnerability, allows unexpected behavior in directories with malicious content

• CVSS 9.8
• CWE-426 Untrusted Search Path
• Input Validation and Sanitization
• Local

Poetry v1.1.9 and below was discovered to contain an untrusted search path which causes the application to behave in unexpected ways when users execute Poetry commands in a directory containing malicious content. This vulnerability occurs when the application is ran on Windows OS.

CVE

CVE-2022-26184

CWE

CWE-426 Untrusted Search Path

CVSS base score

9.8

Published

2022-03-21

OWASP

A05 Security Misconfiguration

Orthogonal defect classification

Function

Code defect classification

Incorrect Functionality

Category

Input Validation and Sanitization

Subcategory

Path Traversal

Accessibility scope

Local

Impact

Arbitrary Code Execution

Fixed by upgrading

Yes

Solution

Update Poetry to version 1.1.10 or higher.

import os
import importlib

def example_import(module_name):
    __import__(module_name)

if __name__ == "__main__":
    module_to_import = input("Enter the module name to import: ")
    example_import(module_to_import)

import os
import sys

def example_import(module_name):
    current_dir = os.getcwd()
    
    trusted_dirs = [os.path.expanduser("~/.local/lib/python3.x/site-packages"), 
                    os.path.dirname(os.path.abspath(__file__))]
    
    if current_dir not in trusted_dirs:
        raise RuntimeError("Untrusted directory: {}".format(current_dir))
    
    __import__(module_name)

if __name__ == "__main__":
    try:
        example_import("some_module")
    except RuntimeError as e:
        print(e)
        sys.exit(1)

@misc{vaitp:cve202226184,
  title        = {{Poetry v1.1.9 and below on Windows: Untrusted search path vulnerability, allows unexpected behavior in directories with malicious content}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2022},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2022-26184},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2022-26184/}}
}