#VU25096 Improper access control in HtmlUnit - CVE-2020-5529

Vulnerability identifier: #VU25096

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-5529

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
HtmlUnit
Client/Desktop applications / Web browsers

Vendor: HtmlUnit

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in Rhino engine. When embedded in Android application, Android-specific initialization of Rhino engine is done in an improper way, hence a remote attacker can use a malicious JavaScript code and execute arbitrary Java code on the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

HtmlUnit: 2.0 - 2.36.0

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External links
https://jvn.jp/en/jp/JVN34535327/index.html

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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.