Description
include/linux/init_task.h in the Linux kernel before 2.6.35 does not prevent signals with a process group ID of zero from reaching the swapper process, which allows local users to cause a denial of service (system crash) by leveraging access to this process group.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fa2755e20ab0c7215d99c2dc7c262e98a09b01df
- https://github.com/torvalds/linux/commit/fa2755e20ab0c7215d99c2dc7c262e98a09b01df
- https://github.com/torvalds/linux/commit/f20011457f41c11edb5ea5038ad0c8ea9f392023
- http://ftp.naist.jp/pub/linux/kernel/v2.6/ChangeLog-2.6.35
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f106eee10038c2ee5b6056aaf3f6d5229be6dcdd
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f20011457f41c11edb5ea5038ad0c8ea9f392023
- [oss-security] 20170120 Re: CVE REQUEST: linux kernel: process with pgid zero able to crash mailing-list
- https://github.com/torvalds/linux/commit/f106eee10038c2ee5b6056aaf3f6d5229be6dcdd
- 97103 vdb-entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1358840