Remote code execution in Node.js

1) Buffer overflow

EUVDB-ID: #VU47248

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-8252

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to incorrect validation of realpath in libuv. The library incorrectly determines the buffer size, which can result in a buffer overflow if the resolved path is longer than 256 bytes. A remote attacker can pass an overly long path to the application that is using the library, trigger memory corruption and execute arbitrary code on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Node.js: 10.0.0 - 14.8.0

CPE2.3

• cpe:2.3:a:node_js_foundation:nodejs:10.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.6.0:*:*:*:*:*:*:*
• cpe:2.3:a:node_js_foundation:nodejs:10.7.0:*:*:*:*:*:*:*

External links

https://nodejs.org/en/blog/vulnerability/september-2020-security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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