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AUSCERT External Security Bulletin Redistribution
ESB-2018.3645
Security update for the Linux RT Kernel
23 November 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Linux RT Kernel
Publisher: SUSE
Operating System: SUSE
Impact/Access: Root Compromise -- Existing Account
Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Access Confidential Data -- Console/Physical
Reduced Security -- Console/Physical
Resolution: Patch/Upgrade
CVE Names: CVE-2018-18710 CVE-2018-18386 CVE-2018-18281
CVE-2018-16658 CVE-2018-14633 CVE-2018-10940
CVE-2018-9516 CVE-2017-1000407 CVE-2017-16533
CVE-2017-7273
Reference: ESB-2018.3584
ESB-2018.3552
ESB-2018.3534
ESB-2018.3510
Original Bulletin:
https://www.suse.com/support/update/announcement/2018/suse-su-20183869-1/
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SUSE Security Update: Security update for the Linux RT Kernel
______________________________________________________________________________
Announcement ID: SUSE-SU-2018:3869-1
Rating: important
References: #1031240 #1047027 #1049128 #1050431 #1064861
#1065600 #1066674 #1071021 #1081680 #1094244
#1094825 #1103145 #1105799 #1106139 #1106240
#1107371 #1107829 #1107849 #1108314 #1108498
#1109806 #1109818 #1110006 #1110247 #1113337
#1113751 #1113769 #1114460 #923775
Cross-References: CVE-2017-1000407 CVE-2017-16533 CVE-2017-7273
CVE-2018-14633 CVE-2018-18281 CVE-2018-18386
CVE-2018-18710 CVE-2018-9516
Affected Products:
SUSE Linux Enterprise Real Time Extension 11-SP4
SUSE Linux Enterprise Debuginfo 11-SP4
______________________________________________________________________________
An update that solves 8 vulnerabilities and has 21 fixes is
now available.
Description:
The SUSE Linux Enterprise 11 SP4 RT kernel was updated to
3.0.101-rt130-69.39 to receive various security and bugfixes.
The following security bugs were fixed:
- CVE-2018-18281: An issue was discovered in the Linux kernel, the
mremap() syscall performs TLB flushes after dropping pagetable locks. If
a syscall such as ftruncate() removes entries from the pagetables of a
task that is in the middle of mremap(), a stale TLB entry can remain for
a short time that permits access to a physical page after it has been
released back to the page allocator and reused (bnc#1113769).
- CVE-2018-18710: An issue was discovered in the Linux kernel, an
information leak in cdrom_ioctl_select_disc in drivers/cdrom/cdrom.c
could be used by local attackers to read kernel memory because a cast
from unsigned long to int interferes with bounds checking. This is
similar to CVE-2018-10940 and CVE-2018-16658 (bnc#1113751).
- CVE-2018-18386: drivers/tty/n_tty.c in the Linux kernel allowed local
attackers (who are able to access pseudo terminals) to hang/block
further usage of any pseudo terminal devices due to an EXTPROC versus
ICANON confusion in TIOCINQ (bnc#1094825).
- CVE-2017-7273: The cp_report_fixup function in drivers/hid/hid-cypress.c
in the Linux kernel 4.x allowed physically proximate attackers to cause
a denial of service (integer underflow) or possibly have unspecified
other impact via a crafted HID report (bnc#1031240).
- CVE-2017-16533: The usbhid_parse function in
drivers/hid/usbhid/hid-core.c in the Linux kernel allowed local users to
cause a denial of service (out-of-bounds read and system crash) or
possibly have unspecified other impact via a crafted USB device
(bnc#1066674).
- CVE-2017-1000407: An denial of service issue was discovered in the Linux
kernel, by flooding the diagnostic port 0x80 an exception can be
triggered leading to a kernel panic (bnc#1071021).
- CVE-2018-9516: An issue was discovered in the Linux kernel, the
copy_to_user() inside the HID code does not correctly check the length
before executing (bsc#1108498).
- CVE-2018-14633: A security flaw was found in the
chap_server_compute_md5() function in the ISCSI target code in the Linux
kernel 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 (bnc#1107829).
The following non-security bugs were fixed:
- Btrfs: fix deadlock when finalizing block group creation (bsc#1107849).
- Btrfs: fix quick exhaustion of the system array in the superblock
(bsc#1107849).
- FS-Cache: Synchronise object death state change vs operation submission
(bsc#1107371).
- KABI: move the new handler to end of machdep_calls and hide it from
genksyms (bsc#1094244).
- KVM: Disable irq while unregistering user notifier (bsc#1106240).
- KVM: SVM: obey guest PAT (bsc#1106240).
- KVM: VMX: remove I/O port 0x80 bypass on Intel hosts (bsc#1106240).
- KVM: emulate: fix CMPXCHG8B on 32-bit hosts (bsc#1106240).
- KVM: x86: emulator: Return to user-mode on L1 CPL=0 emulation failure
(bsc#1106240).
- KVM: x86: fix use of uninitialized memory as segment descriptor in
emulator (bsc#1106240).
- KVM: x86: zero base3 of unusable segments (bsc#1106240).
- NFS - do not hang if xdr decoded username is bad (bsc#1105799).
- NFSv4.1 - Do not leak IO size from one mount to another (bsc#1103145).
- PCI/AER: Report non-fatal errors only to the affected endpoint
(bsc#1109806).
- PCI: Supply CPU physical address (not bus address) to
iomem_is_exclusive() (bsc#1109806).
- PCI: shpchp: Check bridge's secondary (not primary) bus speed
(bsc#1109806).
- PCI: shpchp: Fix AMD POGO identification (bsc#1109806).
- add kernel parameter to disable failfast on block devices (bsc#1081680).
- block: add flag QUEUE_FLAG_REGISTERED (bsc#1047027).
- block: allow gendisk's request_queue registration to be deferred
(bsc#1047027).
- crypto: ghash-clmulni-intel - use C implementation for setkey()
(bsc#1110006).
- dm: fix incomplete request_queue initialization (bsc#1047027).
- dm: only initialize the request_queue once (bsc#1047027).
- firmware/ihex2fw.c: restore missing default in switch statement
(bsc#1114460).
- kernel/relay.c: limit kmalloc size to KMALLOC_MAX_SIZE (git-fixes).
- locks: fix unlock when fcntl_setlk races with a close (git-fixes).
- media: Fix invalid free in the fix for mceusb (bsc#1050431).
- media: cx25821: prevent out-of-bounds read on array card (bsc#1050431).
- media: ite-cir: initialize use_demodulator before using it (bsc#1050431).
- media: mceusb: fix NULL-deref at probe (bsc#1050431).
- media: mceusb: fix memory leaks in error path.
- percpu: make pcpu_alloc_chunk() use pcpu_mem_free() instead of kfree()
(git fixes).
- powerpc, KVM: Rework KVM checks in first-level interrupt handlers
(bsc#1094244).
- powerpc/64: Do load of PACAKBASE in LOAD_HANDLER (bsc#1094244).
- powerpc/64: Fix smp_wmb barrier definition use use lwsync consistently
(bsc#1064861).
- powerpc/64: Initialise thread_info for emergency stacks (bsc#1094244).
- powerpc/64s: Exception macro for stack frame and initial register save
(bsc#1094244).
- powerpc/64s: move machine check SLB flushing to mm/slb.c (bsc#1094244).
- powerpc/asm: Mark cr0 as clobbered in mftb() (bsc#1049128).
- powerpc/book3s: Introduce a early machine check hook in cpu_spec
(bsc#1094244).
- powerpc/book3s: Introduce exclusive emergency stack for machine check
exception (bsc#1094244).
- powerpc/book3s: Split the common exception prolog logic into two section
(bsc#1094244).
- powerpc/book3s: handle machine check in Linux host (bsc#1094244).
- powerpc/mce: Fix SLB rebolting during MCE recovery path (bsc#1094244).
- powerpc/pseries: Avoid using the size greater than (bsc#1094244).
- powerpc/pseries: Defer the logging of rtas error to irq work queue
(bsc#1094244).
- powerpc/pseries: Dump the SLB contents on SLB MCE errors (bsc#1094244).
- powerpc/pseries: Flush SLB contents on SLB MCE errors (bsc#1094244).
- powerpc: Add a symbol for hypervisor trampolines (bsc#1094244).
- powerpc: Fix smp_mb__before_spinlock() (bsc#1110247).
- powerpc: Make load_hander handle upto 64k offset (bsc#1094244).
- powerpc: Rework runlatch code (bsc#1094244).
- powerpc: Save CFAR before branching in interrupt entry paths
(bsc#1094244).
- powerpc: cputable: KABI - hide new cpu_spec member from genksyms
(bsc#1094244).
- powerpc: move MCE handler out-of-line and consolidate with
machine_check_fwnmi (bsc#1094244).
- powerpc: move stab code into #ifndef CONFIG_POWER4_ONLY (bsc#1094244).
- powerpc: replace open-coded EXCEPTION_PROLOG_1 with the macro in slb
miss handlers (bsc#1094244).
- reiserfs: add check to detect corrupted directory entry (bsc#1109818).
- reiserfs: do not panic on bad directory entries (bsc#1109818).
- retpoline: Introduce start/end markers of indirect thunk (bsc#1113337).
- s390/facilites: use stfle_fac_list array size for MAX_FACILITY_BIT
(bnc#1108314, LTC#171326).
- s390/sclp: Change SCLP console default buffer-full behavior
(bnc#1108314, LTC#171049).
- scsi: libfc: Do not drop down to FLOGI for fc_rport_login()
(bsc#1106139).
- scsi: libfc: Do not login if the port is already started (bsc#1106139).
- scsi: libfc: do not advance state machine for incoming FLOGI
(bsc#1106139).
- scsi: storvsc: fix memory leak on ring buffer busy (bnc#923775).
- signals: avoid unnecessary taking of sighand->siglock (bsc#1110247).
- x86/kexec: Avoid double free_page() upon do_kexec_load() failure
(bsc#1110006).
- x86/mm/32: Set the '__vmalloc_start_set' flag in initmem_init()
(bsc#1110006).
- x86/paravirt: Fix some warning messages (bnc#1065600).
- x86/percpu: Fix this_cpu_read() (bsc#1110006).
- x86/process: Re-export start_thread() (bsc#1110006).
- x86/vdso: Fix asm constraints on vDSO syscall fallbacks (bsc#1110006).
Special Instructions and Notes:
Please reboot the system after installing this update.
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 Real Time Extension 11-SP4:
zypper in -t patch slertesp4-kernel-source-rt-13876=1
- SUSE Linux Enterprise Debuginfo 11-SP4:
zypper in -t patch dbgsp4-kernel-source-rt-13876=1
Package List:
- SUSE Linux Enterprise Real Time Extension 11-SP4 (x86_64):
kernel-rt-3.0.101.rt130-69.39.1
kernel-rt-base-3.0.101.rt130-69.39.1
kernel-rt-devel-3.0.101.rt130-69.39.1
kernel-rt_trace-3.0.101.rt130-69.39.1
kernel-rt_trace-base-3.0.101.rt130-69.39.1
kernel-rt_trace-devel-3.0.101.rt130-69.39.1
kernel-source-rt-3.0.101.rt130-69.39.1
kernel-syms-rt-3.0.101.rt130-69.39.1
- SUSE Linux Enterprise Debuginfo 11-SP4 (x86_64):
kernel-rt-debuginfo-3.0.101.rt130-69.39.1
kernel-rt-debugsource-3.0.101.rt130-69.39.1
kernel-rt_debug-debuginfo-3.0.101.rt130-69.39.1
kernel-rt_debug-debugsource-3.0.101.rt130-69.39.1
kernel-rt_trace-debuginfo-3.0.101.rt130-69.39.1
kernel-rt_trace-debugsource-3.0.101.rt130-69.39.1
References:
https://www.suse.com/security/cve/CVE-2017-1000407.html
https://www.suse.com/security/cve/CVE-2017-16533.html
https://www.suse.com/security/cve/CVE-2017-7273.html
https://www.suse.com/security/cve/CVE-2018-14633.html
https://www.suse.com/security/cve/CVE-2018-18281.html
https://www.suse.com/security/cve/CVE-2018-18386.html
https://www.suse.com/security/cve/CVE-2018-18710.html
https://www.suse.com/security/cve/CVE-2018-9516.html
https://bugzilla.suse.com/1031240
https://bugzilla.suse.com/1047027
https://bugzilla.suse.com/1049128
https://bugzilla.suse.com/1050431
https://bugzilla.suse.com/1064861
https://bugzilla.suse.com/1065600
https://bugzilla.suse.com/1066674
https://bugzilla.suse.com/1071021
https://bugzilla.suse.com/1081680
https://bugzilla.suse.com/1094244
https://bugzilla.suse.com/1094825
https://bugzilla.suse.com/1103145
https://bugzilla.suse.com/1105799
https://bugzilla.suse.com/1106139
https://bugzilla.suse.com/1106240
https://bugzilla.suse.com/1107371
https://bugzilla.suse.com/1107829
https://bugzilla.suse.com/1107849
https://bugzilla.suse.com/1108314
https://bugzilla.suse.com/1108498
https://bugzilla.suse.com/1109806
https://bugzilla.suse.com/1109818
https://bugzilla.suse.com/1110006
https://bugzilla.suse.com/1110247
https://bugzilla.suse.com/1113337
https://bugzilla.suse.com/1113751
https://bugzilla.suse.com/1113769
https://bugzilla.suse.com/1114460
https://bugzilla.suse.com/923775
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