Описание
tarfile.extractall() with the 'data' or 'tar'
filter could be bypassed by a crafted archive where a hardlink
references a symlink stored at a deeper name than the hardlink itself.
The extraction fallback validated the symlink at it's archived location
but recreated it at the hardlink's shallower
path, letting a relative
target the filter judged contained escape the destination directory.
This allowed a malicious tar archive to create a symlink pointing
outside the destination, enabling out-of-destination file reads or
writes. This was an incomplete fix of CVE-2025-4330.
A flaw was found in the tarfile.extractall() function within Python. A remote attacker could exploit this vulnerability by providing a specially crafted archive. This archive could bypass security filters by using a hardlink that references a symlink, allowing the symlink to be recreated outside the intended destination directory. This could lead to out-of-destination file reads or writes, potentially resulting in information disclosure or arbitrary file modification.
Отчет
Red Hat products that appear in dependency searches under names containing "tarfile" but that are not the CPython standard-library tarfile module are not affected by this flaw. Matches such as the Go packages under github.com/containers/image / go.podman.io/image (.../docker/tarfile and .../docker/internal/tarfile) and the Apache Camel artifacts (camel-tarfile, camel-quarkus-tarfile) are unrelated implementations in other languages and do not include the vulnerable CPython tarfile.extractall() filter logic. The separately packaged PyPI component backports-tarfile is also out of scope for this CVE as assigned: it is not the CPython stdlib module named in the advisory and this CVE tracks the interpreter-provided tarfile shipped in Red Hat python3* packages.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | python | Not affected | ||
| Red Hat Enterprise Linux 7 | python | Not affected | ||
| Red Hat Enterprise Linux 7 | python3 | Not affected | ||
| Red Hat Enterprise Linux 8 | python3.11 | Will not fix | ||
| Red Hat Enterprise Linux 8 | python36:3.6/python36 | Not affected | ||
| Red Hat Enterprise Linux 8 | python38:3.8/python38 | Out of support scope | ||
| Red Hat Enterprise Linux 8 | python39:3.9/python39 | Out of support scope | ||
| Red Hat Enterprise Linux 9 | python3.11 | Will not fix | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-amd-rhel9 | Not affected | ||
| Red Hat Enterprise Linux AI (RHEL AI) | rhelai1/bootc-aws-nvidia-rhel9 | Not affected |
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Дополнительная информация
Статус:
EPSS
7.3 High
CVSS3
Связанные уязвимости
tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the hardlink's shallower path, letting a relative target the filter judged contained escape the destination directory. This allowed a malicious tar archive to create a symlink pointing outside the destination, enabling out-of-destination file reads or writes. This was an incomplete fix of CVE-2025-4330.
tarfile.extractall() with the 'data' or 'tar' filter could be bypassed by a crafted archive where a hardlink references a symlink stored at a deeper name than the hardlink itself. The extraction fallback validated the symlink at it's archived location but recreated it at the hardlink's shallower path, letting a relative target the filter judged contained escape the destination directory. This allowed a malicious tar archive to create a symlink pointing outside the destination, enabling out-of-destination file reads or writes. This was an incomplete fix of CVE-2025-4330.
tarfile.extractall() with the 'data' or 'tar' filter could be bypasse ...
EPSS
7.3 High
CVSS3