Advisory Details

March 12th, 2019

Microsoft Windows DHCP Client Integer Underflow Remote Code Execution Vulnerability

ZDI-19-272
ZDI-CAN-7822

CVE ID CVE-2019-0726
CVSS SCORE 5.0, (AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on vulnerable installations of Microsoft Windows. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the DHCP Client service. A crafted DHCP packet can trigger an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the Local Service account.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0726
DISCLOSURE TIMELINE
  • 2019-01-11 - Vulnerability reported to vendor
  • 2019-03-12 - Coordinated public release of advisory
  • 2019-04-01 - Advisory Updated
CREDIT Saran Neti of Trend Micro Security Research
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