Vulnerability identifier: #VU31290

Vulnerability risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-16024

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Node.js
Server applications / Web servers

Vendor: Node.js Foundation

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.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Node.js: 0.11.0 - 0.11.8

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.