Advisory Details

August 18th, 2022

(Pwn2Own) Microsoft Windows partmgr Integer Overflow Privilege Escalation Vulnerability

ZDI-22-1072
ZDI-CAN-17396

CVE ID CVE-2022-34703
CVSS SCORE 8.8, (AV:L/AC:L/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 partmgr.sys. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a 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-2022-34703
DISCLOSURE TIMELINE
  • 2022-05-25 - Vulnerability reported to vendor
  • 2022-08-18 - Coordinated public release of advisory
CREDIT nghiadt12 from Viettel Cyber Security
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