Illegal C++ fails to generate C2039 error, allowing buffer overrun by David_cs.1

Closed

as Fixed

Type:	Bug
ID:	612158
Opened:	10/9/2010 4:17:23 PM
Access Restriction:	Public

Workaround(s)

view

User(s) can reproduce this bug

Illegally accessing a member of a nested structure fails to generate a C2039 error.
Interestingly, this allows a buffer overrun without using arrays, pointers, or unions.
Other compilers (g++, Sun's CC) diagnose the error.

This was reported as Bug 406512 for Visual C++ 2008, and a Microsoft comment of 3/17/2009 said "we are going to postpone addressing this problem until the next release of the product". The problem still exists in this next release.

Details (expand)

Visual Studio 2010

Security

Build and run the attached C++ program.

English

Windows Server 2008 R2

English

10 500
600 40

Failure to compile, with two occurrences of
error C2039: 'B' : is not a member of 'A'

File Name	Submitted By	Submitted On	File Size
C2039bug.cpp	David_cs.1	10/9/2010	693 bytes

Posted by Microsoft on 12/21/2010 at 10:07 AM

Hi David:
Thanks for reporting the issue!
A fix for this issue has been checked into the compiler sources. The fix should show up in the next release of Visual C++.

Xiang Fan
Visual C++ Team

Posted by Microsoft on 10/9/2010 at 4:24 PM

Thank you for your feedback, we are currently reviewing the issue you have submitted. If this issue is urgent, please contact support directly(http://support.microsoft.com)

Microsoft