fstream before 1.0.12 is vulnerable to Arbitrary File Overwrite. Extracting tarballs containing a hardlink to a file that already exists in the system, and a file that matches the hardlink, will overwrite the system's file with the contents of the extracted file. The fstream.DirWriter() function is vulnerable.
The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.
| Link | Tags |
|---|---|
| https://www.npmjs.com/advisories/886 | patch vendor advisory |
| https://github.com/npm/fstream/commit/6a77d2fa6e1462693cf8e46f930da96ec1b0bb22 | third party advisory patch |
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00010.html | vendor advisory |
| http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00052.html | vendor advisory |
| https://usn.ubuntu.com/4123-1/ | vendor advisory |