pdm up to 2.9.3 pdm.lock input validation

Summaryinfo

A vulnerability labeled as problematic has been found in pdm up to 2.9.3. Affected by this vulnerability is an unknown functionality of the file pdm.lock. The manipulation results in input validation. This vulnerability was named CVE-2023-45805. The attack needs to be approached locally. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in pdm up to 2.9.3. It has been classified as problematic. Affected is an unknown part of the file pdm.lock. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

pdm is a Python package and dependency manager supporting the latest PEP standards. It's possible to craft a malicious `pdm.lock` file that could allow e.g. an insider or a malicious open source project to appear to depend on a trusted PyPI project, but actually install another project. A project `foo` can be targeted by creating the project `foo-2` and uploading the file `foo-2-2.tar.gz` to pypi.org. PyPI will see this as project `foo-2` version `2`, while PDM will see this as project `foo` version `2-2`. The version must only be `parseable as a version` and the filename must be a prefix of the project name, but it's not verified to match the version being installed. Version `2-2` is also not a valid normalized version per PEP 440. Matching the project name exactly (not just prefix) would fix the issue. When installing dependencies with PDM, what's actually installed could differ from what's listed in `pyproject.toml` (including arbitrary code execution on install). It could also be used for downgrade attacks by only changing the version. This issue has been addressed in commit `6853e2642df` which is included in release version `2.9.4`. Users are advised to upgrade. There are no known workarounds for this vulnerability.

The weakness was presented 10/20/2023 as GHSA-j44v-mmf2-xvm9. The advisory is available at github.com. This vulnerability is traded as CVE-2023-45805 since 10/13/2023. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 2.9.4 eliminates this vulnerability. Applying the patch 6853e2642dfa281d4a9958fbc6c95b7e32d84831 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• pdm

Version

• 2.9.0
• 2.9.1
• 2.9.2
• 2.9.3

License

• open-source

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CPE 2.2info

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