CVE-2019-14751
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of data tampering.
- Exploit odds
- 5.7% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 5.7% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 5.7% · EPSS, next 30 days
- Weakness
- CWE-22 · Path traversal
- Record status
- Modified
Affected
- Nltk < 3.4.5
Attack profile CVSS 3.0 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Raw vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2019-14751.md and follow it. Check whether this project is affected by CVE-2019-14751. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/mssalvatore/CVE-2019-14751_PoC
- https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10
- https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/
- https://github.com/mssalvatore/CVE-2019-14751_PoC
- https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10
- https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/
References
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html
- https://github.com/mssalvatore/CVE-2019-14751_PoC
- https://github.com/nltk/nltk/blob/3.4.5/ChangeLog
- https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/
- https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00054.html
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00001.html
- https://github.com/mssalvatore/CVE-2019-14751_PoC
- https://github.com/nltk/nltk/blob/3.4.5/ChangeLog
- https://github.com/nltk/nltk/commit/f59d7ed8df2e0e957f7f247fe218032abdbe9a10
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QI4IJGLZQ5S7C5LNRNROHAO2P526XE3D/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGZSSEJH7RHH3RBUEVWWYT75QU67J7SE/
- https://salvatoresecurity.com/zip-slip-in-nltk-cve-2019-14751/