Advisory Details

September 12th, 2023

Microsoft Azure DevOps Server MachinePropertyBag Deserialization of Untrusted Data Local Privilege Escalation Vulnerability

ZDI-23-1403
ZDI-CAN-20695

CVE ID CVE-2023-38155
CVSS SCORE 7.0, AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Azure DevOps Server
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Azure DevOps Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the MachinePropertyBag class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the service account.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38155
DISCLOSURE TIMELINE
  • 2023-05-05 - Vulnerability reported to vendor
  • 2023-09-12 - Coordinated public release of advisory
CREDIT Mikhail Shcherbakov (@yu5k3)
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