CVE-2024-12718

Description

Allows modifying some file metadata (e.g. last modified) with filter="data" or file permissions (chmod) with filter="tar" of files outside the extraction directory. 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.

Gravité et risque d'exploitation

CVE-2024-12718 obtient un score CVSS de 5.3/10, soit une gravité moyenne. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.77 %, ce qui la place devant 54.8 % des CVE référencées.

Que faire ?

• Vérifiez si CPython (versions <3.11.13, <3.14.0b3, 3.11.0, 3.13.0, <3.13.4, 3.14.0a1, 3.12.0, 0, <3.10.18, 3.10.0, <3.9.23, <3.12.11) est présent sur votre parc.
• Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
• À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
• Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

• https://github.com/python/cpython/issues/135034
• https://github.com/python/cpython/pull/135037
• https://github.com/python/cpython/issues/127987
• https://mail.python.org/archives/list/security-announce@python.org/thread/MAXIJJCUUMCL7ATZNDVEGGHUMQMUUKLG/
• https://github.com/python/cpython/commit/3612d8f51741b11f36f8fb0494d79086bac9390a
• https://github.com/python/cpython/commit/9e0ac76d96cf80b49055f6d6b9a6763fb9215c2a
• 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/4633f3f497b1ff70e4a35b6fe2c907cbe2d4cb2e
• https://github.com/python/cpython/commit/9c1110ef6652687d7c55f590f909720eddde965a
• https://github.com/python/cpython/commit/aa9eb5f757ceff461e6e996f12c89e5d9b583b01
• https://github.com/python/cpython/commit/dd8f187d0746da151e0025c51680979ac5b4cfb1