Full Disclosure mailing list archives
Re: Re: Linux kernel i386 SMP page fault handler privilege escalation
From: Paul Starzetz <ihaquer () isec pl>
Date: Thu, 13 Jan 2005 17:26:49 +0100 (CET)
On Thu, 13 Jan 2005, Christophe Devine wrote:
Exploiting the race condition itself is quite tricky, especially if the system load is high. The following proof-of-concept code may be used to check if an x86 SMP kernel is vulnerable; it is a bit unreliable though.
That is not really correct. Exploiting this race condition is very easy, however it is always difficult to exploit SMP race conditions if the load is high, since you must achieve parallel execution of two threads and the scheduler may prevent you from parallel execution in that case. -- Paul Starzetz iSEC Security Research http://isec.pl/ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
Current thread:
- Linux kernel i386 SMP page fault handler privilege escalation Paul Starzetz (Jan 12)
- <Possible follow-ups>
- Re: Linux kernel i386 SMP page fault handler privilege escalation Marcy Darcy (Jan 12)
- Re: Linux kernel i386 SMP page fault handler privilege escalation Christophe Devine (Jan 13)
- Re: Re: Linux kernel i386 SMP page fault handler privilege escalation Paul Starzetz (Jan 13)