CVE-2016-4578
Vulnerability Summary
Timeline
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 Metrics
- v3.0•MEDIUM•Score: 5.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:P/I:N/A:N
EPSS Trends
Current EPSS score: 1.20%• Percentile: 67%
Techniques & Countermeasures
- CWE-200•Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
Affected Systems
- canonical•ubuntu_linux
12.04 | 14.04 | 15.10 | 16.04
- debian•linux
< 4.5.5-1 | < 4.5.5-1 | < 4.5.5-1 | < 4.5.5-1
- ubuntu•linux
< 3.13.0-91.138 | < 4.4.0-28.47
- ubuntu•linux-azure
all
- ubuntu•linux-azure-6.11
all
- ubuntu•linux-azure-fde
all
- ubuntu•linux-azure-fde-5.15
all
- ubuntu•linux-gcp
all
- ubuntu•linux-gcp-6.11
all
- ubuntu•linux-gke
all
- ubuntu•linux-gkeop
all
- ubuntu•linux-hwe
all
- ubuntu•linux-hwe-6.11
all
- ubuntu•linux-hwe-edge
all
- ubuntu•linux-intel-iot-realtime
all
- ubuntu•linux-lowlatency-hwe-6.11
all
- ubuntu•linux-lts-utopic
< 3.16.0-76.98~14.04.1
- ubuntu•linux-lts-vivid
< 3.19.0-64.72~14.04.1
- ubuntu•linux-lts-wily
< 4.2.0-41.48~14.04.1
- ubuntu•linux-lts-xenial
< 4.4.0-28.47~14.04.1
- ubuntu•linux-raspi-realtime
all
- ubuntu•linux-raspi2
< 4.4.0-1016.22 | all
- ubuntu•linux-realtime
all | all
- ubuntu•linux-riscv
all | all | all
- ubuntu•linux-snapdragon
< 4.4.0-1019.22
- debian•debian_linux
8.0
- linux•linux_kernel
≤ 4.6
- opensuse•leap
42.1
- opensuse•opensuse
13.1
- redhat•enterprise_linux_desktop
7.0
- redhat•enterprise_linux_server
7.0
- redhat•enterprise_linux_server_aus
7.3 | 7.4 | 7.6
- redhat•enterprise_linux_server_eus
7.3 | 7.4 | 7.5 | 7.6
- redhat•enterprise_linux_server_tus
7.3 | 7.6
- redhat•enterprise_linux_workstation
7.0
References (49)
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00054.html
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e4ec8cc8039a7063e24204299b462bd1383184a5
- http://www.ubuntu.com/usn/USN-3017-1
- https://www.exploit-db.com/exploits/46529/
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00007.html
- http://www.ubuntu.com/usn/USN-3017-3
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
- http://www.ubuntu.com/usn/USN-3018-2
- https://github.com/torvalds/linux/commit/e4ec8cc8039a7063e24204299b462bd1383184a5
- http://www.ubuntu.com/usn/USN-3021-2
- http://www.ubuntu.com/usn/USN-3017-2
- https://bugzilla.redhat.com/show_bug.cgi?id=1335215
- http://rhn.redhat.com/errata/RHSA-2016-2584.html
- http://rhn.redhat.com/errata/RHSA-2016-2574.html
- http://www.ubuntu.com/usn/USN-3019-1
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- http://www.debian.org/security/2016/dsa-3607
- http://www.securityfocus.com/bid/90535
- http://www.ubuntu.com/usn/USN-3016-2
- http://www.ubuntu.com/usn/USN-3016-1
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00052.html
- http://www.ubuntu.com/usn/USN-3021-1
- http://www.ubuntu.com/usn/USN-3018-1
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6
- http://www.openwall.com/lists/oss-security/2016/05/11/5
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html
- http://www.ubuntu.com/usn/USN-3016-3
- https://github.com/torvalds/linux/commit/9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6
- http://www.ubuntu.com/usn/USN-3016-4
- http://www.ubuntu.com/usn/USN-3020-1
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html
- https://ubuntu.com/security/CVE-2016-4578
- https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?h=for-next&id=9a47e9cff994f37f7f0dbd9ae23740d0f64f9fe6
- https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/?h=for-next&id=e4ec8cc8039a7063e24204299b462bd1383184a5
- https://ubuntu.com/security/notices/USN-3016-1
- https://ubuntu.com/security/notices/USN-3016-2
- https://ubuntu.com/security/notices/USN-3017-1
- https://ubuntu.com/security/notices/USN-3017-3
- https://ubuntu.com/security/notices/USN-3016-3
- https://ubuntu.com/security/notices/USN-3016-4
- https://ubuntu.com/security/notices/USN-3017-2
- https://ubuntu.com/security/notices/USN-3020-1
- https://ubuntu.com/security/notices/USN-3018-2
- https://ubuntu.com/security/notices/USN-3018-1
- https://ubuntu.com/security/notices/USN-3019-1
- https://ubuntu.com/security/notices/USN-3021-2
- https://ubuntu.com/security/notices/USN-3021-1
- https://www.cve.org/CVERecord?id=CVE-2016-4578
- https://security-tracker.debian.org/tracker/CVE-2016-4578