#VU72486 Improper access control in Central Authentication Services (CAS) - CVE-2022-39369

Vulnerability identifier: #VU72486

Vulnerability risk: Medium

CVSSv4.0: 5.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-39369

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Central Authentication Services (CAS)
Web applications / Modules and components for CMS

Vendor: Backdrop CMS contributed projects

Description

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

The vulnerability exists due to improper access restrictions within the phpCAS library that is maintained by a third-party. A remote user can bypass implemented security restrictions and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Central Authentication Services (CAS): before 1.x-1.0.1

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External links
https://github.com/apereo/phpCAS/security/advisories/GHSA-8q72-6qq8-xv64
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2XL7SMW6ESSP2Y6HHRYWW2MMCZSI4LBZ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RUA2JM6YT3ZXSZLBJVRA32AXYM3GJMO3/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VJZGTWJ5ZXUUT47EHARNOUUNTH6SYDSE/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.