[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

On Tue, Jun 21, 2011 at 7:22 AM, Brad Hards <bradh@xxxxxxxxxxxxx> 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 current files are dated 2011-05-10) with OUTDATED and VULNERABLE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 suggesting that its OK to distribute outdated libs, just to understand the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