Re: [Full-disclosure] Microsoft Windows XP/2003/Vista memory corruption 0day Dec 21 2006 01:41PM
3APA3A (3APA3A SECURITY NNOV RU) (1 replies)
Re: [Full-disclosure] Microsoft Windows XP/2003/Vista memorycorruption 0day Dec 21 2006 08:11PM
Alexander Sotirov (asotirov determina com) (1 replies)
Re: [Full-disclosure] Microsoft Windows XP/2003/Vista memory corruption 0day Dec 21 2006 10:17PM
Pukhraj Singh (pukhraj singh gmail com)
Holy mackerel! Instances of this bug date back to 1999!



On 12/21/06, Alexander Sotirov <asotirov (at) determina (dot) com [email concealed]> wrote:
> 3APA3A wrote:
> > Killer{R} assumes the problem is in strcpy(), because it should not be
> > used for overlapping buffers, but at least ANSI implementation of strcpy
> > from Visual C should be safe in this very situation (copying to lower
> > addresses). May be code is different for Windows XP or vulnerability is
> > later in code.
> We discovered this bug some time ago and were preparing an advisory when it was
> publicly disclosed. Since the exploit is already public, here's my analysis of
> the vulnerability:
> http://www.determina.com/security.research/vulnerabilities/csrss-harderr
> It's a double free bug that leads to arbitrary code execution in the CSRSS process.
> Alex
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