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AUSCERT External Security Bulletin Redistribution
ESB-2018.3191
Security update for the Linux Kernel (Live Patch 36 for SLE 12)
19 October 2018
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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 -- Existing Account
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-17182 CVE-2018-14634 CVE-2018-14633
Reference: ESB-2018.3166
ESB-2018.3136
ESB-2018.2958
Original Bulletin:
https://www.suse.com/support/update/announcement/2018/suse-su-20183238-1/
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SUSE Security Update: Security update for the Linux Kernel (Live Patch 36 for SLE 12)
______________________________________________________________________________
Announcement ID: SUSE-SU-2018:3238-1
Rating: important
References: #1107832 #1108963 #1110233
Cross-References: CVE-2018-14633 CVE-2018-14634 CVE-2018-17182
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_136 fixes several issues.
The following security issues were fixed:
- CVE-2018-17182: The vmacache_flush_all function in mm/vmacache.c
mishandled sequence number overflows. An attacker can trigger a
use-after-free (and possibly gain privileges) via certain thread
creation, map, unmap, invalidation, and dereference operations
(bsc#1110233).
- CVE-2018-14634: An unprivileged local user with access to SUID (or
otherwise privileged) binary could use this flaw to escalate their
privileges on the system. Kernel versions 2.6.x, 3.10.x and 4.14.x are
believed to be vulnerable (bsc#1108963).
- CVE-2018-14633: A security flaw was found in the
chap_server_compute_md5() function in the ISCSI target code in a way an
authentication request from an ISCSI initiator is processed. An
unauthenticated remote attacker can cause a stack buffer overflow and
smash up to 17 bytes of the stack. The attack requires the iSCSI target
to be enabled on the victim host. Depending on how the target's code was
built (i.e. depending on a compiler, compile flags and hardware
architecture) an attack may lead to a system crash and thus to a
denial-of-service or possibly to a non-authorized access to data
exported by an iSCSI target. Due to the nature of the flaw, privilege
escalation cannot be fully ruled out, although we believe it is highly
unlikely. (bsc#1107832).
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:
- SUSE Linux Enterprise Server 12-LTSS:
zypper in -t patch SUSE-SLE-SERVER-12-2018-2308=1 SUSE-SLE-SERVER-12-2018-2309=1 SUSE-SLE-SERVER-12-2018-2310=1 SUSE-SLE-SERVER-12-2018-2311=1 SUSE-SLE-SERVER-12-2018-2312=1 SUSE-SLE-SERVER-12-2018-2313=1 SUSE-SLE-SERVER-12-2018-2314=1 SUSE-SLE-SERVER-12-2018-2315=1 SUSE-SLE-SERVER-12-2018-2316=1 SUSE-SLE-SERVER-12-2018-2317=1
Package List:
- SUSE Linux Enterprise Server 12-LTSS (x86_64):
kgraft-patch-3_12_61-52_101-default-10-2.1
kgraft-patch-3_12_61-52_101-xen-10-2.1
kgraft-patch-3_12_61-52_106-default-10-2.1
kgraft-patch-3_12_61-52_106-xen-10-2.1
kgraft-patch-3_12_61-52_111-default-9-2.1
kgraft-patch-3_12_61-52_111-xen-9-2.1
kgraft-patch-3_12_61-52_119-default-9-2.1
kgraft-patch-3_12_61-52_119-xen-9-2.1
kgraft-patch-3_12_61-52_122-default-9-2.1
kgraft-patch-3_12_61-52_122-xen-9-2.1
kgraft-patch-3_12_61-52_125-default-8-2.1
kgraft-patch-3_12_61-52_125-xen-8-2.1
kgraft-patch-3_12_61-52_128-default-6-2.1
kgraft-patch-3_12_61-52_128-xen-6-2.1
kgraft-patch-3_12_61-52_133-default-5-2.1
kgraft-patch-3_12_61-52_133-xen-5-2.1
kgraft-patch-3_12_61-52_136-default-5-2.1
kgraft-patch-3_12_61-52_136-xen-5-2.1
kgraft-patch-3_12_61-52_141-default-4-2.1
kgraft-patch-3_12_61-52_141-xen-4-2.1
References:
https://www.suse.com/security/cve/CVE-2018-14633.html
https://www.suse.com/security/cve/CVE-2018-14634.html
https://www.suse.com/security/cve/CVE-2018-17182.html
https://bugzilla.suse.com/1107832
https://bugzilla.suse.com/1108963
https://bugzilla.suse.com/1110233
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