oss-sec mailing list archives
Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel
From: Greg KH <greg () kroah com>
Date: Fri, 20 Jan 2017 09:26:35 +0100
On Fri, Jan 20, 2017 at 01:41:52PM +1100, Harshula wrote:
Hi Folks, Red Hat Product Security has been notified of a kernel vulnerability that a local attacker can exploit to crash/panic the kernel and cause a denial of service. This was reported to Red Hat by Jesse Hertz (CC'd) (reproducer: rt411016): "A process that is in the same process group as the ``init'' process (group id zero) can crash the Linux 2 kernel with several system calls by passing in a process ID or process group ID of zero. The value zero is a special value that indicates the current process ID or process group. However, in this case it is also the process group ID of the process." I've been testing whether RHEL is vulnerable and found the following: * Upstream/mainline is not vulnerable
Is this true for the mainline kernel tree that RHEL 6 was based on?
* RHEL 7 is not vulnerable * RHEL 6 is vulnerable * RHEL 5 is partially vulnerable
So this is only due to a specific set of patches that were added to RHEL 6 and RHEL 5 yet never made it upstream? I ask as we want to make sure some of the older LTS mainline kernels might be affected and it would be good to ensure they are not. thanks, greg k-h
Current thread:
- CVE REQUEST: linux kernel: process with pgid zero able to crash kernel Harshula (Jan 19)
- Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel Greg KH (Jan 20)
- Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel Harshula (Jan 20)
- Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel Brad Spengler (Jan 20)
- Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel Greg KH (Jan 20)
- Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel cve-assign (Jan 20)
- Re: CVE REQUEST: linux kernel: process with pgid zero able to crash cve-assign (Jan 20)
- Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel Greg KH (Jan 20)