Vulnerability identifier: #VU77225
Vulnerability risk: High
CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID:
CWE-ID:
CWE-287
Exploitation vector: Network
Exploit availability: Yes
Vulnerable software:
Microsoft SharePoint Server
Server applications /
Application servers
Vendor: Microsoft
Description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error within the ValidateTokenIssuer method. A remote attacker can bypass authentication process and gain unauthorized access to the application.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Microsoft SharePoint Server: 2019
External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-29357
https://www.zerodayinitiative.com/advisories/ZDI-23-882/
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?
Yes. This vulnerability is being exploited in the wild.