CVE-2017-16221 Directory Traversal in yzt
An attacker can read arbitrary files from the server filesystem by exploiting a directory traversal vulnerability in the yzt Node.js module.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-16221?
CVE-2017-16221 is a high-severity path traversal vulnerability in HackerOne yzt node module, published on 7 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
yzt is a simple file server. yzt is vulnerable to a directory traversal issue, giving an attacker access to the filesystem by placing "../" in the url.
Weakness: CWE-22
Which versions are affected by CVE-2017-16221?
2 open source packages ship an affected version, including yzt. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
yzt npm | From 0.0.0 | None |
yzt npm | From 0.0.0 | None |
Products include Yzt Project Yzt.
How do I fix CVE-2017-16221?
No fix has been published for CVE-2017-16221 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2017-16221 being exploited?
There is no known exploitation of CVE-2017-16221 in the wild and no public exploit code.
Sources
Also known as GHSA-q48g-p5cx-c7c7.