Advisory Details

June 12th, 2024

(Pwn2Own) Microsoft Windows cldflt Heap-based Buffer Overflow Local Privilege Escalation Vulnerability

ZDI-24-601
ZDI-CAN-23845

CVE ID CVE-2024-30085
CVSS SCORE 7.8, AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. 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 cldflt kernel driver. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

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-2024-30085
DISCLOSURE TIMELINE
  • 2024-04-03 - Vulnerability reported to vendor
  • 2024-06-12 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated
CREDIT Gwangun Jung(@pr0ln) and Junoh Lee(@bbbig12) at Theori(@theori_io)
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