#VU48224 Improper access control in Active Directory - CVE-2020-2300

Vulnerability identifier: #VU48224

Vulnerability risk: Medium

CVSSv4.0: 6.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-2300

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Active Directory
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

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

The vulnerability exists due to the Windows/ADSI mode does not specifically prohibit use of empty passwords. A remote attacker can log in to Jenkins as any user by providing an empty password.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Active Directory: 1 - 2.19

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External links
https://www.openwall.com/lists/oss-security/2020/11/04/6
https://www.jenkins.io/security/advisory/2020-11-04/#SECURITY-2099

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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.