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.Referenceshttps://github.com/nltk/nltk/blob/3.4.5/ChangeLoghttps://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/https://github.com/mssalvatore/CVE-2019-14751_PoChttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html
