Path Traversal in Nltk
CVE-2019-14751
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.057 (92.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.057 · newest: 0.057 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/nltk/nltk/blob/3.4.5/ChangeLog (Release Notes)
- github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10 (Patch)
- salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/ (Exploit, Patch, Third Party Advisory)
- github.com/mssalvatore/CVE-2019-14751_PoC (Exploit, Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html (vendor-advisory)
Frequently asked questions
- What is CVE-2019-14751?
- CVE-2019-14751 is a high-severity vulnerability in Nltk, classified under Path Traversal. CVSS score: 7.5/10. Published 2019-08-22.
- How severe is CVE-2019-14751?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-14751 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.