Vulnerability identifier: #VU47248

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8252

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libuv
Other software / Other software solutions

Vendor: libuv.org

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 update from vendor's website.

Vulnerable software versions

libuv: 0.10.2 - 1.38.1

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External links
http://hackerone.com/reports/965914
http://nodejs.org/en/blog/vulnerability/september-2020-security-releases/
http://security.gentoo.org/glsa/202009-15
http://usn.ubuntu.com/4548-1/

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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