SUSE-SU-2020:2106-1: important: Security update for the Linux Kernel
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Mon Aug 3 13:12:51 MDT 2020
SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________
Announcement ID: SUSE-SU-2020:2106-1
Rating: important
References: #1051510 #1065729 #1071995 #1104967 #1152107
#1158755 #1162002 #1170011 #1171078 #1171673
#1171732 #1171868 #1172257 #1172775 #1172781
#1172782 #1172783 #1172999 #1173265 #1173280
#1173514 #1173567 #1173573 #1173659 #1173999
#1174000 #1174115 #1174462 #1174543
Cross-References: CVE-2019-16746 CVE-2019-20908 CVE-2020-0305
CVE-2020-10766 CVE-2020-10767 CVE-2020-10768
CVE-2020-10769 CVE-2020-10773 CVE-2020-12771
CVE-2020-12888 CVE-2020-13974 CVE-2020-14416
CVE-2020-15393 CVE-2020-15780
Affected Products:
SUSE Linux Enterprise Module for Live Patching 15
______________________________________________________________________________
An update that solves 14 vulnerabilities and has 15 fixes
is now available.
Description:
The SUSE Linux Enterprise 15 GA LTSS kernel was updated to receive various
security and bugfixes.
The following security bugs were fixed:
- CVE-2020-0305: In cdev_get of char_dev.c, there is a possible
use-after-free due to a race condition. This could lead to local
escalation of privilege with System execution privileges needed. User
interaction is not needed for exploitation (bnc#1174462).
- CVE-2019-20908: An issue was discovered in drivers/firmware/efi/efi.c
where incorrect access permissions for the efivar_ssdt ACPI variable
could be used by attackers to bypass lockdown or secure boot
restrictions, aka CID-1957a85b0032 (bnc#1173567).
- CVE-2020-15780: An issue was discovered in drivers/acpi/acpi_configfs.c
where injection of malicious ACPI tables via configfs could be used by
attackers to bypass lockdown and secure boot restrictions, aka
CID-75b0cea7bf30 (bnc#1173573).
- CVE-2020-15393: usbtest_disconnect in drivers/usb/misc/usbtest.c had a
memory leak, aka CID-28ebeb8db770 (bnc#1173514).
- CVE-2020-12771: btree_gc_coalesce in drivers/md/bcache/btree.c has a
deadlock if a coalescing operation fails (bnc#1171732).
- CVE-2019-16746: An issue was discovered in net/wireless/nl80211.c which
did not check the length of variable elements in a beacon head, leading
to a buffer overflow (bnc#1152107 1173659).
- CVE-2020-12888: The VFIO PCI driver mishandled attempts to access
disabled memory space (bnc#1171868).
- CVE-2020-10769: A buffer over-read flaw was found in
crypto_authenc_extractkeys in crypto/authenc.c in the IPsec
Cryptographic algorithm's module, authenc. When a payload longer than 4
bytes, and is not following 4-byte alignment boundary guidelines, it
causes a buffer over-read threat, leading to a system crash. This flaw
allowed a local attacker with user privileges to cause a denial of
service (bnc#1173265).
- CVE-2020-10773: A kernel stack information leak on s390/s390x was fixed
(bnc#1172999).
- CVE-2020-14416: A race condition in tty->disc_data handling in the slip
and slcan line discipline could lead to a use-after-free, aka
CID-0ace17d56824. This affects drivers/net/slip/slip.c and
drivers/net/can/slcan.c (bnc#1162002).
- CVE-2020-10768: Indirect branch speculation could have been enabled
after it was force-disabled by the PR_SPEC_FORCE_DISABLE prctl command.
(bnc#1172783).
- CVE-2020-10766: Fixed Rogue cross-process SSBD shutdown, where a Linux
scheduler logical bug allows an attacker to turn off the SSBD
protection. (bnc#1172781).
- CVE-2020-10767: Indirect Branch Prediction Barrier was force-disabled
when STIBP is unavailable or enhanced IBRS is available. (bnc#1172782).
- CVE-2020-13974: drivers/tty/vt/keyboard.c had an integer overflow if
k_ascii is called several times in a row, aka CID-b86dab054059
(bnc#1172775).
The following non-security bugs were fixed:
- Merge ibmvnic reset fixes (bsc#1158755 ltc#182094).
- block, bfq: add requeue-request hook (bsc#1104967 bsc#1171673).
- block, bfq: postpone rq preparation to insert or merge (bsc#1104967
bsc#1171673).
- ibmvnic: Do not process device remove during device reset (bsc#1065729).
- ibmvnic: Flush existing work items before device removal (bsc#1065729).
- ibmvnic: Harden device login requests (bsc#1170011 ltc#183538).
- ibmvnic: Skip fatal error reset after passive init (bsc#1171078
ltc#184239).
- ibmvnic: continue to init in CRQ reset returns H_CLOSED (bsc#1173280
ltc#185369).
- intel_idle: Graceful probe failure when MWAIT is disabled (bsc#1174115).
- livepatch: Apply vmlinux-specific KLP relocations early (bsc#1071995).
- livepatch: Disallow vmlinux.ko (bsc#1071995).
- livepatch: Make klp_apply_object_relocs static (bsc#1071995).
- livepatch: Prevent module-specific KLP rela sections from referencing
vmlinux symbols (bsc#1071995).
- livepatch: Remove .klp.arch (bsc#1071995).
- vfio/pci: Fix SR-IOV VF handling with MMIO blocking (bsc#1051510).
- vfio/pci: Fix SR-IOV VF handling with MMIO blocking (bsc#1174000).
- vfio/pci: Mask buggy SR-IOV VF INTx support (bsc#1051510).
- vfio/pci: Mask buggy SR-IOV VF INTx support (bsc#1173999).
- x86/{mce,mm}: Unmap the entire page if the whole page is affected and
poisoned (bsc#1172257).
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 Module for Live Patching 15:
zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2020-2106=1
Package List:
- SUSE Linux Enterprise Module for Live Patching 15 (ppc64le x86_64):
kernel-default-debuginfo-4.12.14-150.55.1
kernel-default-debugsource-4.12.14-150.55.1
kernel-default-livepatch-4.12.14-150.55.1
kernel-livepatch-4_12_14-150_55-default-1-1.3.1
kernel-livepatch-4_12_14-150_55-default-debuginfo-1-1.3.1
References:
https://www.suse.com/security/cve/CVE-2019-16746.html
https://www.suse.com/security/cve/CVE-2019-20908.html
https://www.suse.com/security/cve/CVE-2020-0305.html
https://www.suse.com/security/cve/CVE-2020-10766.html
https://www.suse.com/security/cve/CVE-2020-10767.html
https://www.suse.com/security/cve/CVE-2020-10768.html
https://www.suse.com/security/cve/CVE-2020-10769.html
https://www.suse.com/security/cve/CVE-2020-10773.html
https://www.suse.com/security/cve/CVE-2020-12771.html
https://www.suse.com/security/cve/CVE-2020-12888.html
https://www.suse.com/security/cve/CVE-2020-13974.html
https://www.suse.com/security/cve/CVE-2020-14416.html
https://www.suse.com/security/cve/CVE-2020-15393.html
https://www.suse.com/security/cve/CVE-2020-15780.html
https://bugzilla.suse.com/1051510
https://bugzilla.suse.com/1065729
https://bugzilla.suse.com/1071995
https://bugzilla.suse.com/1104967
https://bugzilla.suse.com/1152107
https://bugzilla.suse.com/1158755
https://bugzilla.suse.com/1162002
https://bugzilla.suse.com/1170011
https://bugzilla.suse.com/1171078
https://bugzilla.suse.com/1171673
https://bugzilla.suse.com/1171732
https://bugzilla.suse.com/1171868
https://bugzilla.suse.com/1172257
https://bugzilla.suse.com/1172775
https://bugzilla.suse.com/1172781
https://bugzilla.suse.com/1172782
https://bugzilla.suse.com/1172783
https://bugzilla.suse.com/1172999
https://bugzilla.suse.com/1173265
https://bugzilla.suse.com/1173280
https://bugzilla.suse.com/1173514
https://bugzilla.suse.com/1173567
https://bugzilla.suse.com/1173573
https://bugzilla.suse.com/1173659
https://bugzilla.suse.com/1173999
https://bugzilla.suse.com/1174000
https://bugzilla.suse.com/1174115
https://bugzilla.suse.com/1174462
https://bugzilla.suse.com/1174543
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