Caleb Brown

**Name of the Vulnerable Software and Affected Versions** Python versions prior to 2.3 **Description** The 'zipfile' module does not validate the ZIP64 End of Central Directory (EOCD) Locator record offset value, leading to potential discrepancies in how ZIP archives are handled compared to other ZIP implementations. Specifically, the module incorrectly assumes the ZIP64 EOCD record's location, potentially allowing crafted ZIP archives to be processed in an unexpected manner. **Recommendations** Update to version 2.3 or later.

**Name of the Vulnerable Software and Affected Versions** Python versions 3.12 and later **Description** The issue allows the extraction filter to be ignored, enabling symlink targets to point outside the destination directory and the modification of some file metadata. This affects users who extract untrusted tar archives using TarFile.extractall() or TarFile.extract() with the filter parameter set to "data" or "tar". For Python 3.14 and later, the default filter value changed to "data", which also affects usage relying on this new default behavior. The installation of source distributions, which are tar archives, is not significantly affected as they already allow arbitrary code execution during the build process. **Recommendations** For Python versions 3.12 and later, consider avoiding the use of the filter parameter with values "data" or "tar" when extracting untrusted tar archives using TarFile.extractall() or TarFile.extract() until a patch is available. As a temporary workaround, consider disabling the extraction filter feature when dealing with untrusted archives. For Python 3.14 and later, be cautious when relying on the new default filter behavior, as it may introduce this issue.

**Name of the Vulnerable Software and Affected Versions** Python versions 3.12 and later **Description** The issue allows the extraction filter to be ignored, enabling symlink targets to point outside the destination directory and the modification of some file metadata. This affects users who utilize the tarfile module to extract untrusted tar archives using TarFile.extractall() or TarFile.extract() with the filter parameter set to "data" or "tar". For Python 3.14 and later, the default filter value changed to "data", which also affects usage relying on this new default behavior. The installation of source distributions, which are tar archives, is not significantly affected as they already allow arbitrary code execution during the build process. **Recommendations** For Python versions 3.12 and later, consider updating to a version where this issue is fixed, although the specific fixed version is not provided. As a temporary workaround, avoid using the filter parameter with values of "data" or "tar" when extracting untrusted tar archives with TarFile.extractall() or TarFile.extract() until a patch is available. Restrict access to untrusted tar archives to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** Python versions 3.12 and later **Description** The issue allows arbitrary filesystem writes outside the extraction directory during extraction with filter="data" when using the tarfile module to extract untrusted tar archives. This affects users of Python versions 3.12 or later, as earlier versions do not include the extraction filter feature. For Python 3.14 or later, the default value of filter changed to "data", so users relying on this new default behavior are also affected. **Recommendations** For Python versions 3.12 and later, update to a version where the issue is fixed, as the default behavior change in Python 3.14 or later may affect usage. As a temporary workaround, consider avoiding the use of the filter parameter with a value of "data" or "tar" in TarFile.extractall() or TarFile.extract() until a patch is available. Restrict access to untrusted tar archives to minimize the risk of exploitation.