| Package | Affected versions | Patched versions |
|---|---|---|
| org.apache.nifi:nifi-single-user-utils | < 1.16 | 1.16 |
| nifi | ≥ 1.14.0, < 1.16.0 | 1.16.0 |
org.apache.nifi.authentication.single.user.writer.StandardLoginCredentialsWriter contains a local information disclosure vulnerability due to writing credentials (username and password) to a file that is readable by all other users on unix-like systems. On unix-like systems, the system's temporary directory is shared between all users on that system. As such, files written to that directory without setting the correct file permissions can allow other users on that system to view the contents of the files written to those temporary files.
An insecure temporary file is created here:
The username and password credentials are written to this file here:
The vulnerability has been patched in version 1.16.
This vulnerability impacts Unix-like systems, and very old versions of Mac OSX and Windows as they all share the system temporary directory between all users.
Setting the java.io.tmpdir system environment variable to a directory that is exclusively owned by the executing user will fix this vulnerability for all operating systems.
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