—

PYSEC-2019-106

Details

NLTK Downloader before 3.4.5 is vulnerable to a directory traversal, allowing attackers to write arbitrary files via a ../ (dot dot slash) in an NLTK package (ZIP archive) that is mishandled during extraction.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / nltk

Introduced in: 0 Fixed in: f59d7ed8df2e0e957f7f247fe218032abdbe9a10

Fix pip install --upgrade 'nltk>=f59d7ed8df2e0e957f7f247fe218032abdbe9a10'

References

https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10 [FIX]
https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/ [WEB]
https://github.com/nltk/nltk/blob/3.4.5/ChangeLog [WEB]
https://github.com/mssalvatore/CVE-2019-14751_PoC [WEB]
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/ [WEB]
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/ [WEB]
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html [WEB]
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html [WEB]
https://github.com/advisories/GHSA-mr7p-25v2-35wr [ADVISORY]