#VU67281 Deserialization of Untrusted Data in Microsoft products - CVE-2022-35823

Vulnerability identifier: #VU67281

Vulnerability risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-35823

CWE-ID: CWE-502

Exploitation vector: Network

Exploit availability: No

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

Vendor: Microsoft

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to insecure input validation when processing serialized data when handling custom workflows. A remote user can pass specially crafted data to the application and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2019

Microsoft SharePoint Foundation: 2013 Service Pack 1

Microsoft SharePoint Enterprise Server: 2013 Service Pack 1 - 2016

Microsoft SharePoint Server Subscription Edition: All versions

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-35823
https://www.zerodayinitiative.com/advisories/ZDI-22-1288/

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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.