#VU48734 Prototype Pollution in systeminformation - CVE-2020-26245

Vulnerability identifier: #VU48734

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-26245

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

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

Vendor: Sebastian Hildebrandt

Description

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

The vulnerability exists due to improper input validation in service parameter strings that are passed to si.inetChecksite(). A remote attacker can overwrite the properties and functions of an object, which can lead to executing arbitraty commands.

Mitigation
Install update from vendor's website.

Vulnerable software versions

systeminformation: 4.12.1 - 4.30.4

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External links
https://github.com/sebhildebrandt/systeminformation/commit/8113ff0e87b2f422a5756c48f1057575e73af016
https://github.com/sebhildebrandt/systeminformation/security/advisories/GHSA-4v2w-h9jm-mqjg

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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.