Advisory Details

February 12th, 2019

Microsoft Access Database Engine ACEEXCL Use-After-Free Remote Code Execution Vulnerability

ZDI-19-192
ZDI-CAN-7396

CVE ID CVE-2019-0671
CVSS SCORE 7.8, AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Office
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Access Database Engine. 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 when reading and writing to XLS files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. 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-2019-0671
DISCLOSURE TIMELINE
  • 2018-10-22 - Vulnerability reported to vendor
  • 2019-02-12 - Coordinated public release of advisory
CREDIT rgod of 9sg Security Team - rgod@9sgsec.com
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