Advisory Details

January 10th, 2019

Microsoft Visual Studio asm Memory Corruption Remote Code Execution Vulnerability

ZDI-19-015
ZDI-CAN-7370

CVE ID CVE-2019-0546
CVSS SCORE 8.1, AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Visual Studio
VULNERABILITY DETAILS

This vulnerability allows attackers to execute arbitrary code on executables compiled using vulnerable installations of Microsoft Visual Studio. Attack vectors will vary depending on the nature of the executable in question.

The specific flaw exists within the compilation of __asm blocks in Visual C++. Incorrect output produced by the compiler can result in a memory corruption condition. 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-2019-0546
DISCLOSURE TIMELINE
  • 2018-10-15 - Vulnerability reported to vendor
  • 2019-01-10 - Coordinated public release of advisory
CREDIT Simon Zuckerbraun of Trend Micro Zero Day Initiative
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