National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-14751 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N (V3.0 legend)
Impact Score: 3.6
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/mssalvatore/CVE-2019-14751_PoC Exploit Patch Third Party Advisory
https://github.com/nltk/nltk/blob/3.4.5/ChangeLog Release Notes
https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10 Patch
https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/ Exploit Patch Third Party Advisory

Technical Details

Vulnerability Type (View All)

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

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
3.4.5


Change History

1 change record found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-14751
NVD Published Date:
08/22/2019
NVD Last Modified:
08/29/2019