CVE-2025-4138

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-4138
Allows the extraction filter to be ignored, allowing symlink targets to point outside the destination directory, and the modification of some file metadata. You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information. Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected. Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://gist.github.com/sethmlarson/52398e33eff261329a0180ac1d54f42f
https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da
https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9
https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a
https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e
https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a
https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a
https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01
https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1
https://github.com/python/cpython/issues/135034
https://github.com/python/cpython/pull/135037
https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/
Configurations

No configuration.

History

05 Jun 2025, 14:15

Type Values Removed Values Added
Summary (en) Allows the extraction filter to be ignored, allowing symlink targets to point outside the destination directory, and the modification of some file metadata. You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information. Only Python versions 3.12 or later are affected by these vulnerabilities, earlier versions don't include the extraction filter feature. Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected. Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links. (en) Allows the extraction filter to be ignored, allowing symlink targets to point outside the destination directory, and the modification of some file metadata. You are affected by this vulnerability if using the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() using the filter= parameter with a value of "data" or "tar". See the tarfile extraction filters documentation https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter  for more information. Note that for Python 3.14 or later the default value of filter= changed from "no filtering" to `"data", so if you are relying on this new default behavior then your usage is also affected. Note that none of these vulnerabilities significantly affect the installation of source distributions which are tar archives as source distributions already allow arbitrary code execution during the build process. However when evaluating source distributions it's important to avoid installing source distributions with suspicious links.

04 Jun 2025, 14:54

Type Values Removed Values Added
Summary
  • (es) Permite ignorar el filtro de extracción, lo que permite que los enlaces simbólicos apunten fuera del directorio de destino y la modificación de algunos metadatos de archivo. Esta vulnerabilidad afecta al usar el módulo tarfile para extraer archivos tar no confiables mediante TarFile.extractall() o TarFile.extract() y el parámetro filter= con el valor "data" o "tar". Consulte la documentación sobre filtros de extracción de archivos tar (https://docs.python.org/3/library/tarfile.html#tarfile-extraction-filter) para obtener más información. Solo las versiones de Python 3.12 o posteriores se ven afectadas por estas vulnerabilidades; las versiones anteriores no incluyen la función de filtro de extracción. Tenga en cuenta que para Python 3.14 o posteriores, el valor predeterminado de filter= cambió de "sin filtrado" a "data", por lo que si utiliza este nuevo comportamiento predeterminado, su uso también se verá afectado. Tenga en cuenta que ninguna de estas vulnerabilidades afecta significativamente la instalación de distribuciones de código fuente que sean archivos tar, ya que estas permiten la ejecución de código arbitrario durante el proceso de compilación. Sin embargo, al evaluar distribuciones de origen es importante evitar instalar distribuciones de origen con enlaces sospechosos.

03 Jun 2025, 21:15

Type Values Removed Values Added
References
  • () https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a -
  • () https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1 -

03 Jun 2025, 16:15

Type Values Removed Values Added
References
  • () https://github.com/python/cpython/commit/28463dba112af719df1e8b0391c46787ad756dd9 -
  • () https://github.com/python/cpython/commit/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e -

03 Jun 2025, 15:15

Type Values Removed Values Added
References
  • () https://github.com/python/cpython/commit/19de092debb3d7e832e5672cc2f7b788d35951da -
  • () https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01 -

03 Jun 2025, 14:15

Type Values Removed Values Added
References
  • () https://gist.github.com/sethmlarson/52398e33eff261329a0180ac1d54f42f -
  • () https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a -
  • () https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a -
  • () https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/ -

03 Jun 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-03 13:15

Updated : 2025-06-05 14:15

NVD link : CVE-2025-4138

Mitre link : CVE-2025-4138

CVE.ORG link : CVE-2025-4138

JSON object : View

Products Affected

No product.

CWE
CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')