CVE-2019-14751 : NLTK Downloader before 3.4.5 is vulnerable to a directory traversal, allowing at

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.

Published 2019-08-22 16:15:10

Updated 2020-03-27 10:15:12

Source MITRE

View at NVD, CVE.org

Vulnerability category: Directory traversal

Products affected by CVE-2019-14751

Nltk » Nltk
Versions before (<) 3.4.5
cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2019-14751

EPSS FAQ

0.77%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 82 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-14751

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
7.5	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE ids for CVE-2019-14751

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-14751

http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html

[security-announce] openSUSE-SU-2020:0440-1: moderate: Security update f
https://github.com/mssalvatore/CVE-2019-14751_PoC

GitHub - mssalvatore/CVE-2019-14751_PoC: A Proof of Concept for CVE-2019-14751
Exploit;Patch;Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/

[SECURITY] Fedora 32 Update: python-nltk-3.4.5-2.fc32 - package-announce - Fedora Mailing-Lists
http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html

[security-announce] openSUSE-SU-2020:0436-1: moderate: Security update f
https://github.com/nltk/nltk/blob/3.4.5/ChangeLog

nltk/ChangeLog at 3.4.5 · nltk/nltk · GitHub
Release Notes
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/

[SECURITY] Fedora 31 Update: python-nltk-3.4.5-2.fc31 - package-announce - Fedora Mailing-Lists
https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/

Zip Slip in NLTK (CVE-2019-14751) – Mike Salvatore's Blog
Exploit;Patch;Third Party Advisory
https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10

CVE-2019-14751: · nltk/nltk@f59d7ed · GitHub
Patch

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Vulnerability Details : CVE-2019-14751

Products affected by CVE-2019-14751

Exploit prediction scoring system (EPSS) score for CVE-2019-14751

CVSS scores for CVE-2019-14751

CWE ids for CVE-2019-14751

References for CVE-2019-14751