#VU74153 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in Matrix Javascript SDK - CVE-2023-28427

Vulnerability identifier: #VU74153

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-28427

CWE-ID: CWE-1321

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Matrix Javascript SDK
Web applications / JS libraries

Vendor: Matrix.org

Description

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

The vulnerability exists due to a prototype pollution issue in Matrix SDK. A remote attacker can pass specially crafted input with events containing special strings in key locations and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Matrix Javascript SDK: 0.1.0 - 23.5.0

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External links
https://matrix.org/blog/2023/03/28/security-releases-matrix-js-sdk-24-0-0-and-matrix-react-sdk-3-69-0
https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-mwq8-fjpf-c2gr

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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.