Advisory Details

July 23rd, 2020

Microsoft Windows JET Database Engine Integer Underflow Remote Code Execution Vulnerability

ZDI-20-924
ZDI-CAN-11121

CVE ID CVE-2020-1400
CVSS SCORE 7.0, (AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H)
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Windows
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Microsoft Windows. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the JET database engine. Crafted data in an MDB file can trigger an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process.

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-2020-1400
DISCLOSURE TIMELINE
  • 2020-05-21 - Vulnerability reported to vendor
  • 2020-07-23 - Coordinated public release of advisory
CREDIT Hossein Lotfi of Trend Micro Zero Day Initiative
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