oss-sec mailing list archives
Re: Linux kernel futex local privilege escalation (CVE-2014-3153)
From: Greg KH <greg () kroah com>
Date: Thu, 5 Jun 2014 08:54:54 -0700
On Thu, Jun 05, 2014 at 07:24:30PM +0400, Solar Designer wrote:
Greg, Thomas - On Thu, Jun 05, 2014 at 06:45:45PM +0400, Solar Designer wrote:This was handled via linux-distros, hence the mandatory oss-security posting. The issue was made public earlier today, and is included in this Debian advisory: https://lists.debian.org/debian-security-announce/2014/msg00130.html --- CVE-2014-3153 Pinkie Pie discovered an issue in the futex subsystem that allows a local user to gain ring 0 control via the futex syscall. An unprivileged user could use this flaw to crash the kernel (resulting in denial of service) or for privilege escalation. --- I've attached patches by Thomas Gleixner (four e-mails, in mbox format),Can you comment on how the four patches: Subject: [patch 1/4] futex-prevent-requeue-pi-on-same-futex.patch Subject: [patch 2/4] futex: Validate atomic acquisition in Subject: [patch 3/4] futex: Always cleanup owner tid in unlock_pi Subject: [patch 4/4] futex: Make lookup_pi_state more robust
Those have to go on top of:
relate to these two on LKML: Subject: [PATCH 3.14 001/228] futex: Add another early deadlock detection check Subject: [PATCH 3.14 002/228] futex: Prevent attaching to kernel threads
These, as these two patches are already in Linus's tree. Now if these two are needed for the first 4 to work properly, that I do not know, Thomas might. I see no reason why a distro would not want these two patches anyway, as they made the stable kernel criteria. thanks, greg k-h
Current thread:
- Linux kernel futex local privilege escalation (CVE-2014-3153) Solar Designer (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Solar Designer (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Greg KH (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Kees Cook (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Phil Turnbull (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) John Johansen (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Rich Felker (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Solar Designer (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Rich Felker (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Thomas Gleixner (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) rf (Jun 06)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Greg KH (Jun 06)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) rf (Jun 06)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Solar Designer (Jun 05)
- Re: Linux kernel futex local privilege escalation (CVE-2014-3153) Solar Designer (Jun 05)