[security-announce] SUSE-SU-2017:0228-1: important: Security update for Linux Kernel Live Patch 1 for SLE 12 SP2

[news 28]

SUSE Security Update: Security update for Linux Kernel Live Patch 1 for SLE 12 SP2

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Announcement ID: SUSE-SU-2017:0228-1

Rating: important

References: #1012852 #1013543 #1014271 #1019079

Cross-References: CVE-2016-10088 CVE-2016-8632 CVE-2016-9576

CVE-2016-9794

Affected Products:

SUSE Linux Enterprise Live Patching 12

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An update that fixes four vulnerabilities is now available.

 

Description:

 

This update for the Linux Kernel 4.4.21-81 fixes several issues.

 

The following security bugs were fixed:

- CVE-2016-10088: The sg implementation in the Linux kernel did not

properly restrict write operations in situations where the KERNEL_DS

option is set, which allowed local users to read or write to arbitrary

kernel memory locations or cause a denial of service (use-after-free) by

leveraging access to a /dev/sg device, related to block/bsg.c and

drivers/scsi/sg.c. NOTE: this vulnerability exists because of an

incomplete fix for CVE-2016-9576 (bsc#1019079).

- CVE-2016-9794: Race condition in the snd_pcm_period_elapsed function in

sound/core/pcm_lib.c in the ALSA subsystem in the Linux kernel allowed

local users to cause a denial of service (use-after-free) or possibly

have unspecified other impact via a crafted SNDRV_PCM_TRIGGER_START

command (bsc#1013543).

- CVE-2016-8632: The tipc_msg_build function in net/tipc/msg.c in the

Linux kernel did not validate the relationship between the minimum

fragment length and the maximum packet size, which allowed local users

to gain privileges or cause a denial of service (heap-based buffer

overflow) by leveraging the CAP_NET_ADMIN capability (bsc#1012852).

- CVE-2016-9576: The blk_rq_map_user_iov function in block/blk-map.c in

the Linux kernel did not properly restrict the type of iterator, which

allowed local users to read or write to arbitrary kernel memory

locations or cause a denial of service (use-after-free) by leveraging

access to a /dev/sg device (bsc#1014271). before 4.8.14

 

 

Patch Instructions:

 

To install this SUSE Security Update use YaST online_update.

Alternatively you can run the command listed for your product:

 

- SUSE Linux Enterprise Live Patching 12:

 

zypper in -t patch SUSE-SLE-Live-Patching-12-2017-110=1

 

To bring your system up-to-date, use "zypper patch".

 

 

Package List:

 

- SUSE Linux Enterprise Live Patching 12 (x86_64):

 

kgraft-patch-4_4_21-81-default-3-2.1

 

 

References:

 

https://www.suse.com/security/cve/CVE-2016-10088.html

https://www.suse.com/security/cve/CVE-2016-8632.html

https://www.suse.com/security/cve/CVE-2016-9576.html

https://www.suse.com/security/cve/CVE-2016-9794.html

https://bugzilla.suse.com/1012852

https://bugzilla.suse.com/1013543

https://bugzilla.suse.com/1014271

https://bugzilla.suse.com/1019079

 

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