Vulnerability identifier: #VU30928

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-7928

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Magento Open Source
Web applications / E-Commerce systems

Vendor: Magento, Inc

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

A denial-of-service (DoS) vulnerability exists in Magento 2.1 prior to 2.1.18, Magento 2.2 prior to 2.2.9, Magento 2.3 prior to 2.3.2. By abusing insufficient brute-forcing defenses in the token exchange protocol, an unauthenticated attacker could disrupt transactions between the Magento merchant and PayPal.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Magento Open Source: 2.3.0 - 2.3.1

---

External links
http://magento.com/security/patches/magento-2.3.2-2.2.9-and-2.1.18-security-update-13

---

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.