Information disclosure in Node.js - CVE-2017-16024

Detailed vulnerability description

The vulnerability allows a remote authenticated user to gain access to sensitive information.

The sync-exec module is used to simulate child_process.execSync in node versions <0.11.9. Sync-exec uses tmp directories as a buffer before returning values. Other users on the server have read access to the tmp directory, possibly allowing an attacker on the server to obtain confidential information from the buffer/tmp file, while it exists.

How to mitigate CVE-2017-16024

Sources

• https://cwe.mitre.org/data/definitions/377.html
• https://github.com/gvarsanyi/sync-exec/issues/17
• https://nodesecurity.io/advisories/310
• https://www.owasp.org/index.php/Insecure_Temporary_File