Security update for the Linux Kernel
Announcement ID: | SUSE-SU-2018:1375-1 |
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Rating: | important |
References: | |
Cross-References: | |
CVSS scores: |
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Affected Products: |
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An update that solves three vulnerabilities and has five security fixes can now be installed.
Description:
The SUSE Linux Enterprise 12 SP1 LTSS kernel was updated to receive various security and bugfixes.
The following security bugs were fixed:
- CVE-2018-3639: Information leaks using "Memory Disambiguation" feature in modern CPUs were mitigated, aka "Spectre Variant 4" (bnc#1087082).
A new boot commandline option was introduced, "spec_store_bypass_disable", which can have following values:
- auto: Kernel detects whether your CPU model contains an implementation of Speculative Store Bypass and picks the most appropriate mitigation.
- on: disable Speculative Store Bypass
- off: enable Speculative Store Bypass
- prctl: Control Speculative Store Bypass per thread via prctl. Speculative Store Bypass is enabled for a process by default. The state of the control is inherited on fork.
- seccomp: Same as "prctl" above, but all seccomp threads will disable SSB unless they explicitly opt out.
The default is "seccomp", meaning programs need explicit opt-in into the mitigation.
Status can be queried via the /sys/devices/system/cpu/vulnerabilities/spec_store_bypass file, containing:
- "Vulnerable"
- "Mitigation: Speculative Store Bypass disabled"
- "Mitigation: Speculative Store Bypass disabled via prctl"
-
"Mitigation: Speculative Store Bypass disabled via prctl and seccomp"
-
CVE-2018-1000199: An address corruption flaw was discovered while modifying a h/w breakpoint via 'modify_user_hw_breakpoint' routine, an unprivileged user/process could use this flaw to crash the system kernel resulting in DoS OR to potentially escalate privileges on a the system. (bsc#1089895)
- CVE-2018-10675: The do_get_mempolicy function in mm/mempolicy.c allowed local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via crafted system calls (bnc#1091755).
The following non-security bugs were fixed:
- x86/bugs: Make sure that _TIF_SSBD does not end up in _TIF_ALLWORK_MASK (bsc#1093215).
- x86/bugs: correctly force-disable IBRS on !SKL systems (bsc#1092497).
- x86/cpu/intel: Introduce macros for Intel family numbers (bsc#985025).
- x86/speculation: Remove Skylake C2 from Speculation Control microcode blacklist (bsc#1087845).
Special Instructions and Notes:
- Please reboot the system after installing this update.
Patch Instructions:
To install this SUSE update use the SUSE recommended
installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
-
Public Cloud Module 12
zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2018-954=1
-
SUSE Linux Enterprise Server for SAP Applications 12 SP1
zypper in -t patch SUSE-SLE-SAP-12-SP1-2018-954=1
-
SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1
zypper in -t patch SUSE-SLE-SERVER-12-SP1-2018-954=1
Package List:
-
Public Cloud Module 12 (nosrc x86_64)
- kernel-ec2-3.12.74-60.64.93.1
-
Public Cloud Module 12 (x86_64)
- kernel-ec2-devel-3.12.74-60.64.93.1
- kernel-ec2-debugsource-3.12.74-60.64.93.1
- kernel-ec2-extra-3.12.74-60.64.93.1
- kernel-ec2-debuginfo-3.12.74-60.64.93.1
- kernel-ec2-extra-debuginfo-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server for SAP Applications 12 SP1 (nosrc ppc64le x86_64)
- kernel-default-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server for SAP Applications 12 SP1 (ppc64le x86_64)
- kernel-syms-3.12.74-60.64.93.1
- kernel-default-base-debuginfo-3.12.74-60.64.93.1
- kernel-default-base-3.12.74-60.64.93.1
- kernel-default-debugsource-3.12.74-60.64.93.1
- kernel-default-debuginfo-3.12.74-60.64.93.1
- kernel-default-devel-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server for SAP Applications 12 SP1 (noarch)
- kernel-source-3.12.74-60.64.93.1
- kernel-devel-3.12.74-60.64.93.1
- kernel-macros-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server for SAP Applications 12 SP1 (nosrc x86_64)
- kernel-xen-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server for SAP Applications 12 SP1 (x86_64)
- kgraft-patch-3_12_74-60_64_93-xen-1-2.5.1
- kernel-xen-base-debuginfo-3.12.74-60.64.93.1
- kgraft-patch-3_12_74-60_64_93-default-1-2.5.1
- kernel-xen-devel-3.12.74-60.64.93.1
- kernel-xen-debugsource-3.12.74-60.64.93.1
- kernel-xen-base-3.12.74-60.64.93.1
- kernel-xen-debuginfo-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 (nosrc ppc64le s390x x86_64)
- kernel-default-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 (ppc64le s390x x86_64)
- kernel-syms-3.12.74-60.64.93.1
- kernel-default-base-debuginfo-3.12.74-60.64.93.1
- kernel-default-base-3.12.74-60.64.93.1
- kernel-default-debugsource-3.12.74-60.64.93.1
- kernel-default-debuginfo-3.12.74-60.64.93.1
- kernel-default-devel-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 (noarch)
- kernel-source-3.12.74-60.64.93.1
- kernel-devel-3.12.74-60.64.93.1
- kernel-macros-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 (s390x)
- kernel-default-man-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 (nosrc x86_64)
- kernel-xen-3.12.74-60.64.93.1
-
SUSE Linux Enterprise Server 12 SP1 LTSS 12-SP1 (x86_64)
- kgraft-patch-3_12_74-60_64_93-xen-1-2.5.1
- kernel-xen-base-debuginfo-3.12.74-60.64.93.1
- kgraft-patch-3_12_74-60_64_93-default-1-2.5.1
- kernel-xen-devel-3.12.74-60.64.93.1
- kernel-xen-debugsource-3.12.74-60.64.93.1
- kernel-xen-base-3.12.74-60.64.93.1
- kernel-xen-debuginfo-3.12.74-60.64.93.1
References:
- https://www.suse.com/security/cve/CVE-2018-1000199.html
- https://www.suse.com/security/cve/CVE-2018-10675.html
- https://www.suse.com/security/cve/CVE-2018-3639.html
- https://bugzilla.suse.com/show_bug.cgi?id=1087082
- https://bugzilla.suse.com/show_bug.cgi?id=1087845
- https://bugzilla.suse.com/show_bug.cgi?id=1089895
- https://bugzilla.suse.com/show_bug.cgi?id=1091755
- https://bugzilla.suse.com/show_bug.cgi?id=1092497
- https://bugzilla.suse.com/show_bug.cgi?id=1093215
- https://bugzilla.suse.com/show_bug.cgi?id=1094019
- https://bugzilla.suse.com/show_bug.cgi?id=985025