PublicDateAtUSN: 2019-08-20
Candidate: CVE-2019-14751
PublicDate: 2019-08-22 16:15:00 UTC
References:
 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14751
 https://github.com/nltk/nltk/blob/3.4.5/ChangeLog
 https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/
 https://github.com/mssalvatore/CVE-2019-14751_PoC
 https://ubuntu.com/security/notices/USN-4106-1
Description:
 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.
Ubuntu-Description:
 It was discovered that NLTK mishandled crafted ZIP archives during extraction.
 A remote attacker could use this vulnerability to write arbitrary files to the
 filesystem
Notes:
Bugs:
 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=935201
Priority: medium
Discovered-by: Mike Salvatore
Assigned-to:
CVSS:
 nvd: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N [7.5 HIGH]


Patches_nltk:
 upstream: https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10
upstream_nltk: released (3.4.5)
precise/esm_nltk: DNE
trusty_nltk: ignored (out of standard support)
trusty/esm_nltk: DNE
xenial_nltk: released (3.1-1ubuntu0.1)
bionic_nltk: released (3.2.5-1ubuntu0.1)
disco_nltk: released (3.4-1ubuntu0.1)
devel_nltk: not-affected (3.4.5-1)