Re: Perfect PDF products distributed with vulnerable MSVC++ libraries

[Jeffrey Walton <noloader () gmail com>]

On Tue, Jun 21, 2011 at 7:22 AM, Brad Hards <bradh () frogmouth net> wrote:
> On Sunday 19 June 2011 11:37:33 Stefan Kanthak wrote:
> > soft Xpansion <www.soft-xpansion.com> distributes their (freeware)
> > products "Perfect PDF 7 Master" and "Perfect PDF 7 Reader" (the
> > current files are dated 2011-05-10) with OUTDATED and VULNERABLE
> > Visual C++ 2008 runtime libraries VCRedist_x86.exe/VCRedist_x64.exe
> > version 9.0.30729.17 of 2008-08-08.
> >
> > These libraries have been updated since then at least twice due to
> > vulnerabilities, see
> > <http://www.microsoft.com/technet/security/bulletin/MS09-035.mspx>
> > and
> > <http://www.microsoft.com/technet/security/bulletin/MS11-025.mspx>
> Did you check if these vulnerabilities be exploited via this product? I'm not
> suggesting that its OK to distribute outdated libs, just to understand the
> risk a little more.
You need to worry about more than just this product. If an attacker
launches a vulnerable executable for which he has a vector (not
necessarily this product), all he/she needs to do is set the current
directory to the location of the flawed DLL. I believe it would
succeed because so few actually set SafeDllSearchMode to enabled (from
my auditing experience). See
http://msdn.microsoft.com/en-us/library/ms682586%28VS.85%29.aspx.

Jeff
Jeff