Vulnerability CVE-2022-21230

Vulnerability CVE-2022-21230

Published: 2022-05-01

Description:

This affects all versions of package org.nanohttpd:nanohttpd. Whenever an HTTP Session is parsing the body of an HTTP request, the body of the request is written to a RandomAccessFile when the it is larger than 1024 bytes. This file is created with insecure permissions that allow its contents to be viewed by all users on the host machine. Workaround: Manually specifying the -Djava.io.tmpdir= argument when launching Java to set the temporary directory to a directory exclusively controlled by the current user can fix this issue.

References:

https://github.com/NanoHttpd/nanohttpd/blob/efb2ebf85a2b06f7c508aba9eaad5377e3a01e81/core/src/main/java/org/nanohttpd/protocols/http/tempfiles/DefaultTempFileManager.java%23L60

https://github.com/NanoHttpd/nanohttpd/blob/efb2ebf85a2b06f7c508aba9eaad5377e3a01e81/core/src/main/java/org/nanohttpd/protocols/http/tempfiles/DefaultTempFile.java%23L58

https://github.com/JLLeitschuh/security-research/security/advisories/GHSA-2r85-x9cf-8fcg

https://snyk.io/vuln/SNYK-JAVA-ORGNANOHTTPD-2422798