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AUSCERT External Security Bulletin Redistribution
ESB-2019.0892
SUSE-SU-2019:0645-1 Security update for the Linux Kernel
(Live Patch 33 for SLE 12)
20 March 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Linux kernel
Publisher: SUSE
Operating System: SUSE
Impact/Access: Root Compromise -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-9213 CVE-2019-7221 CVE-2018-5391
Reference: ESB-2018.3654
ESB-2018.3640
ESB-2018.3590
ESB-2018.3563
Original Bulletin:
https://www.suse.com/support/update/announcement/2019/suse-su-20190645-1.html
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SUSE Security Update: Security update for the Linux Kernel (Live Patch 33 for
SLE 12)
______________________________________________________________________________
Announcement ID: SUSE-SU-2019:0645-1
Rating: important
References: #1103098 #1124734 #1128378
Cross-References: CVE-2018-5391 CVE-2019-7221 CVE-2019-9213
Affected Products:
SUSE Linux Enterprise Server 12-LTSS
______________________________________________________________________________
An update that fixes three vulnerabilities is now available.
Description:
This update for the Linux Kernel 3.12.61-52_125 fixes several issues.
The following security issues were fixed:
o CVE-2019-9213: Expand_downwards in mm/mmap.c lacked a check for the mmap
minimum address, which made it easier for attackers to exploit kernel NULL
pointer dereferences on non-SMAP platforms. This is related to a capability
check for the wrong task (bsc#1128378).
o CVE-2019-7221: Fixed a user-after-free vulnerability in the KVM hypervisor
related to the emulation of a preemption timer, allowing an guest user/
process to crash the host kernel. (bsc#1124734).
o CVE-2018-5391: The Linux kernel was vulnerable to a denial of service
attack with low rates of specially modified packets targeting IP fragment
re-assembly. An attacker might have caused a denial of service condition by
sending specially crafted IP fragments. Various vulnerabilities in IP
fragmentation have been discovered and fixed over the years. The current
vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with
the increase of the IP fragment reassembly queue size (bsc#1103098).
Patch Instructions:
To install this SUSE Security Update use the SUSE recommended installation
methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
o SUSE Linux Enterprise Server 12-LTSS:
zypper in -t patch SUSE-SLE-SERVER-12-2019-645=1
SUSE-SLE-SERVER-12-2019-646=1 SUSE-SLE-SERVER-12-2019-647=1
SUSE-SLE-SERVER-12-2019-648=1 SUSE-SLE-SERVER-12-2019-649=1
SUSE-SLE-SERVER-12-2019-650=1
Package List:
o SUSE Linux Enterprise Server 12-LTSS (x86_64):
kgraft-patch-3_12_61-52_125-default-12-2.1
kgraft-patch-3_12_61-52_125-xen-12-2.1
kgraft-patch-3_12_61-52_128-default-10-2.1
kgraft-patch-3_12_61-52_128-xen-10-2.1
kgraft-patch-3_12_61-52_133-default-9-2.1
kgraft-patch-3_12_61-52_133-xen-9-2.1
kgraft-patch-3_12_61-52_136-default-9-2.1
kgraft-patch-3_12_61-52_136-xen-9-2.1
kgraft-patch-3_12_61-52_141-default-8-2.1
kgraft-patch-3_12_61-52_141-xen-8-2.1
kgraft-patch-3_12_61-52_146-default-6-2.1
kgraft-patch-3_12_61-52_146-xen-6-2.1
References:
o https://www.suse.com/security/cve/CVE-2018-5391.html
o https://www.suse.com/security/cve/CVE-2019-7221.html
o https://www.suse.com/security/cve/CVE-2019-9213.html
o https://bugzilla.suse.com/1103098
o https://bugzilla.suse.com/1124734
o https://bugzilla.suse.com/1128378
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