Patch

CVE-2024-39705

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Vulnerability Overview

CVE Name

CVE-2024-39705

Severity

9.8

Critical

CVE Description

NLTK through 3.8.1 allows remote code execution if untrusted packages have pickled Python code, and the integrated data package download functionality is used. This affects, for example, averaged_perceptron_tagger and punkt.

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Latest Patch info

There is no patch available at the moment, but you can use our script.

Patch Name

Date

Script

Script Type

Remediation script

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What Does the Remediation Script Do? The script first checks if NLTK is installed by trying to import it in Python. If NLTK isn't installed, it exits the script with a message. The script uses pip to upgrade NLTK to the latest secure version, ensuring the system is no longer running a vulnerable version. After upgrading, the script verifies the new version of NLTK installed and prints it for confirmation. It checks if potentially vulnerable data packages (averaged_perceptron_tagger and punkt) are installed using NLTK's data package management system. If they are found, the script removes them from NLTK's data path to prevent further vulnerabilities. Finally, the script prints a message confirming that the remediation process is complete, with NLTK upgraded and vulnerable packages removed if present. This ensures the NLTK package and its potentially vulnerable components are fully secured.

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#!/bin/bash

# Check if NLTK is installed
if ! python3 -c "import nltk" &> /dev/null; then
  echo "NLTK is not installed."
  exit 1
fi

# Upgrade NLTK to the latest secure version
echo "Upgrading NLTK to the latest secure version..."
pip install --upgrade nltk

# Verify the upgrade
installed_version=$(python3 -c "import nltk; print(nltk.__version__)")
echo "Upgraded NLTK version: $installed_version"

# List of potentially vulnerable data packages
vulnerable_packages=("averaged_perceptron_tagger" "punkt")

# Remove vulnerable packages
echo "Removing potentially vulnerable data packages..."
for package in "${vulnerable_packages[@]}"; do
  if python3 -c "import nltk; nltk.data.find('tokenizers/$package')" &> /dev/null; then
    python3 -c "import nltk; nltk.data.path = [d for d in nltk.data.path if not d.endswith('/$package')]"
    echo "Removed $package package."
  else
    echo "$package was not installed."
  fi
done

echo "Remediation complete. NLTK has been upgraded and vulnerable packages removed if present."

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Affected OS & Apps

No items found.

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