CVE-2016-4578 Information

Description

sound/core/timer.c in the Linux kernel through 4.6 does not initialize certain r1 data structures which allows local users to obtain sensitive information from kernel stack memory via crafted use of the ALSA timer interface related to the (1) snd_timer_user_ccallback and (2) snd_timer_user_tinterrupt functions.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e4ec8cc8039a7063e24204299b462bd1383184a5 http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html http://rhn.redhat.com/errata/RHSA-2016-2574.html http://rhn.redhat.com/errata/RHSA-2016-2584.html http://www.debian.org/security/2016/dsa-3607 http://www.openwall.com/lists/oss-security/2016/05/11/5 http://www.securityfocus.com/bid/90535 http://www.ubuntu.com/usn/USN-3016-1 http://www.ubuntu.com/usn/USN-3016-2 http://www.ubuntu.com/usn/USN-3016-3 http://www.ubuntu.com/usn/USN-3016-4 http://www.ubuntu.com/usn/USN-3017-1 http://www.ubuntu.com/usn/USN-3017-2 http://www.ubuntu.com/usn/USN-3017-3 http://www.ubuntu.com/usn/USN-3018-1 http://www.ubuntu.com/usn/USN-3018-2 http://www.ubuntu.com/usn/USN-3019-1 http://www.ubuntu.com/usn/USN-3020-1 http://www.ubuntu.com/usn/USN-3021-1 http://www.ubuntu.com/usn/USN-3021-2 https://bugzilla.redhat.com/show_bug.cgi?id=1335215 https://github.com/torvalds/linux/commit/9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6 https://github.com/torvalds/linux/commit/e4ec8cc8039a7063e24204299b462bd1383184a5 https://www.exploit-db.com/exploits/46529/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.5