#VU70959 Security features bypass in Microsoft products - CVE-2023-21743

Vulnerability identifier: #VU70959

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-21743

CWE-ID: CWE-254

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft SharePoint Server Subscription Edition
Server applications / Application servers
Microsoft SharePoint Server
Server applications / Application servers
Microsoft SharePoint Enterprise Server
Server applications / Application servers

Vendor: Microsoft

Description

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

The vulnerability exists due to security features bypass in Microsoft SharePoint Server. A remote attacker can bypass authentication and make an anonymous connection.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server Subscription Edition: All versions

Microsoft SharePoint Server: 2019

Microsoft SharePoint Enterprise Server: 2016

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-21743

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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.