CVE-2019-14751
Published: 20 August 2019
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.
From the Ubuntu Security Team
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
Priority
Status
| Package | Release | Status |
|---|---|---|
|
nltk Launchpad, Ubuntu, Debian |
bionic |
Released
(3.2.5-1ubuntu0.1)
|
| disco |
Released
(3.4-1ubuntu0.1)
|
|
| trusty |
Released
(2.0~b9-0ubuntu4.1~esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(3.4.5)
|
|
| xenial |
Released
(3.1-1ubuntu0.1)
|
|
|
Patches: upstream: https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | High |
| Availability impact | None |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |