Bug 1771375 (CVE-2019-14751)

Summary:	CVE-2019-14751 python-nltk: directory traversal vulnerability allows attackers to write arbitrary files via ../
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	michel
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	NLTK 3.4.5	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-11-12 12:51:14 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1771376, 1771377
Bug Blocks:

Description Dhananjay Arunesh 2019-11-12 09:22:15 UTC

A vulnerability was found in 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.


Reference:
https://github.com/mssalvatore/CVE-2019-14751_PoC
https://github.com/nltk/nltk/blob/3.4.5/ChangeLog
https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10
https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/

Comment 1 Dhananjay Arunesh 2019-11-12 09:22:37 UTC

Created python-nltk tracking bugs for this issue:

Affects: epel-6 [bug 1771377]
Affects: fedora-all [bug 1771376]

Comment 2 Product Security DevOps Team 2019-11-12 12:51:14 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.