CVE-2018-1002203 Arbitrary File Write via Archive Extraction in unzipper
Attackers can write arbitrary files via Zip-Slip in the unzipper library, potentially leading to code execution or data modification.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2018-1002203?
CVE-2018-1002203 is a medium-severity path traversal vulnerability in node.js unzipper, published on 25 Jul 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
unzipper npm library before 0.8.13 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.
Weakness: CWE-22
Which versions are affected by CVE-2018-1002203?
2 open source packages ship an affected version, including unzipper. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
unzipper npm | All versions | 0.8.13 |
unzipper npm | All versions | 0.8.13 |
Products include Unzipper Project Unzipper.
How do I fix CVE-2018-1002203?
Upgrade unzipper to 0.8.13 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2018-1002203 being exploited?
There is no known exploitation of CVE-2018-1002203 in the wild and no public exploit code.
Sources
Also known as CVE-2018-3782, GHSA-884w-698f-927f.