#VU92245 Prototype pollution in ejs - CVE-2024-33883

Vulnerability identifier: #VU92245

Vulnerability risk: High

CVSSv4.0: 8.9 [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:P/U:Amber]

CVE-ID: CVE-2024-33883

CWE-ID: CWE-1321

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
ejs
Other software / Other software solutions

Vendor: mde (Matthew Eernisse)

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to improper input validation. A remote attacker can add or modify properties of Object.prototype using a __proto__ or constructor payload to execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

ejs: 2.0.1 - 3.1.9

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External links
https://github.com/mde/ejs/commit/e469741dca7df2eb400199e1cdb74621e3f89aa5
https://github.com/mde/ejs/compare/v3.1.9...v3.1.10
https://security.netapp.com/advisory/ntap-20240605-0003/

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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. However, proof of concept for this vulnerability is available.