Date: Mon, 20 Jul 2009 14:32:58 +0200 From: yersinia <yersinia.spiros@...il.com> To: oss-security@...ts.openwall.com Cc: dailydave <dailydave@...ts.immunitysec.com> Subject: Re: Linux 2.6.30+/SELinux/RHEL5 test kernel 0day, exploiting the unexploitable On Mon, Jul 20, 2009 at 12:01 PM, Marcus Meissner <meissner@...e.de> wrote: > On Fri, Jul 17, 2009 at 09:23:03AM +0200, yersinia wrote: > > FYI, a Sprengler 0-day against Selinux null ptr dereference. Very Nice > > to see in action > > > > reference ( with youtube link ) > > > > http://grsecurity.net/~spender/cheddar_bay.tgz<http://grsecurity.net/%7Espender/cheddar_bay.tgz> > > Yeah. > > Some "minor" bugs and one larger one. > > The Linux folks have meanwhile: > > - Fixed the actual bug. ;) (CVE-2009-1897) > Only affects 2.6.30,18.104.22.168. > > 22.214.171.124 release soon. > > - Added -fno-delete-null-pointers to their Makefiles > > Also in 126.96.36.199 and 2. > > - fixed the personality - PER_CLEAR_ON_SETTID inheritance issue > (CVE-2009-1895) > to work around mmap_min_addr protection. > Affects 2.6.23-188.8.131.52 > > 184.108.40.206 and 2.6.27.x releases soon. > > I am not sure about the SELinux policy error he used to > exploit the RHEL 5.? Beta. > > Ciao, Marcus > This is the answer on this the issue by James Morris, Selinux Kernel Developer http://blog.namei.org/2009/07/18/a-brief-note-on-the-2630-kernel-null-pointer-vulnerability/ Ciao, Elia
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