Bugzilla – Bug 986794
VUL-0: CVE-2014-9903: kernel-source: The sched_read_attr function in kernel/sched/core.c in the Linuxkernel 3.14-rc before 3.14-rc4 uses...
Last modified: 2016-06-28 10:42:56 UTC
CVE-2014-9903 The sched_read_attr function in kernel/sched/core.c in the Linux kernel 3.14-rc before 3.14-rc4 uses an incorrect size, which allows local users to obtain sensitive information from kernel stack memory via a crafted sched_getattr system call. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-9903 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9903
I have actually no furhter information. with the 2014 id and the function i think it is: commit 4efbc454ba68def5ef285b26ebfcfdb605b52755 Author: Vegard Nossum <vegard.nossum@oracle.com> Date: Sun Feb 16 22:24:17 2014 +0100 sched: Fix information leak in sys_sched_getattr() We're copying the on-stack structure to userspace, but forgot to give the right number of bytes to copy. This allows the calling process to obtain up to PAGE_SIZE bytes from the stack (and possibly adjacent kernel memory). This fix copies only as much as we actually have on the stack (attr->size defaults to the size of the struct) and leaves the rest of the userspace-provided buffer untouched. Found using kmemcheck + trinity. Fixes: d50dde5a10f30 ("sched: Add new scheduler syscalls to support an extended scheduling parameters ABI") Cc: Dario Faggioli <raistlin@linux.it> Cc: Juri Lelli <juri.lelli@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1392585857-10725-1-git-send-email-vegard.nossum@oracle.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de> diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 33d030a..a6e7470 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3786,7 +3786,7 @@ static int sched_read_attr(struct sched_attr __user *uattr, attr->size = usize; } - ret = copy_to_user(uattr, attr, usize); + ret = copy_to_user(uattr, attr, attr->size); if (ret) return -EFAULT;
d50dde5a10f30 was added for 3.13, the fix was added for 3.14. this range does not cover any suse linux / opensuse product.