#VU80692 Deserialization of Untrusted Data in Azure DevOps Server - CVE-2023-38155

Vulnerability identifier: #VU80692

Vulnerability risk: Low

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

CVE-ID: CVE-2023-38155

CWE-ID: CWE-502

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Azure DevOps Server
Server applications / Application servers

Vendor: Microsoft

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to insecure input validation when processing serialized data within the MachinePropertyBag class. A local user can pass specially crafted data to the server and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Azure DevOps Server: before 20230601.3

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-38155
https://www.zerodayinitiative.com/advisories/ZDI-23-1403/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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