Vulnerability identifier: #VU30976

Vulnerability risk: High

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-5448

CWE-ID: CWE-310

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
yarn
Web applications / Modules and components for CMS

Vendor: Yarn

Description

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

Yarn before 1.17.3 is vulnerable to Missing Encryption of Sensitive Data due to HTTP URLs in lockfile causing unencrypted authentication data to be sent over the network.

Mitigation
Install update from vendor's website.

Vulnerable software versions

yarn: 1.17.0 - 1.17.2

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External links
http://github.com/ChALkeR/notes/blob/master/Yarn-vuln.md
http://hackerone.com/reports/640904
http://yarnpkg.com/blog/2019/07/12/recommended-security-update/

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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.