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SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________

Announcement ID: SUSE-SU-2021:2422-1
Rating: important
References: #1104967 #1174978 #1179610 #1185701 #1185861
#1186463 #1186484 #1187038 #1187050 #1187215
#1187452 #1187554 #1187595 #1187601 #1187934
#1188062 #1188116
Cross-References: CVE-2020-24588 CVE-2020-26558 CVE-2020-36385
CVE-2020-36386 CVE-2021-0129 CVE-2021-0512
CVE-2021-0605 CVE-2021-22555 CVE-2021-33200
CVE-2021-33624 CVE-2021-33909 CVE-2021-34693
CVE-2021-3609
CVSS scores:
CVE-2020-24588 (NVD) : 3.5
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
CVE-2020-24588 (SUSE): 6.5
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVE-2020-26558 (NVD) : 4.2
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVE-2020-26558 (SUSE): 4.2
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVE-2020-36385 (NVD) : 7.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVE-2020-36385 (SUSE): 8.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2020-36386 (NVD) : 7.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CVE-2020-36386 (SUSE): 5.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CVE-2021-0129 (NVD) : 5.7
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVE-2021-0129 (SUSE): 6.4
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
CVE-2021-0512 (SUSE): 8.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2021-0605 (NVD) : 4.4
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CVE-2021-0605 (SUSE): 7.4
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2021-22555 (NVD) : 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-22555 (SUSE): 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-33200 (NVD) : 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-33200 (SUSE): 8.4
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVE-2021-33624 (NVD) : 4.7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVE-2021-33624 (SUSE): 5.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVE-2021-33909 (SUSE): 7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVE-2021-34693 (SUSE): 6.2
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVE-2021-3609 (SUSE): 7
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Products:
SUSE OpenStack Cloud Crowbar 9
SUSE OpenStack Cloud 9
SUSE Linux Enterprise Server for SAP 12-SP4
SUSE Linux Enterprise Server 12-SP4-LTSS
SUSE Linux Enterprise Live Patching 12-SP4
SUSE Linux Enterprise High Availability 12-SP4
______________________________________________________________________________

An update that solves 13 vulnerabilities and has four fixes
is now available.

Description:

The SUSE Linux Enterprise 12 SP4 LTSS kernel was updated to receive
various security and bugfixes.

The following security bugs were fixed:

- CVE-2021-22555: A heap out-of-bounds write was discovered in
net/netfilter/x_tables.c (bnc#1188116).
- CVE-2021-33909: Extremely large seq buffer allocations in seq_file could
lead to buffer underruns and code execution (bsc#1188062).
- CVE-2021-3609: A use-after-free in can/bcm could have led to privilege
escalation (bsc#1187215).
- CVE-2021-33624: In kernel/bpf/verifier.c a branch can be mispredicted
(e.g., because of type confusion) and consequently an unprivileged BPF
program can read arbitrary memory locations via a side-channel attack,
aka CID-9183671af6db (bnc#1187554).
- CVE-2021-0605: In pfkey_dump of af_key.c, there is a possible
out-of-bounds read due to a missing bounds check. This could lead to
local information disclosure in the kernel with System execution
privileges needed. User interaction is not needed for exploitation
(bnc#1187601).
- CVE-2021-0512: In __hidinput_change_resolution_multipliers of
hid-input.c, there is a possible out of bounds write due to a heap
buffer overflow. This could lead to local escalation of privilege with
no additional execution privileges needed. User interaction is not
needed for exploitation (bnc#1187595).
- CVE-2020-26558: Bluetooth LE and BR/EDR secure pairing in Bluetooth Core
Specification 2.1 may permit a nearby man-in-the-middle attacker to
identify the Passkey used during pairing (in the Passkey authentication
procedure) by reflection of the public key and the authentication
evidence of the initiating device, potentially permitting this attacker
to complete authenticated pairing with the responding device using the
correct Passkey for the pairing session. The attack methodology
determines the Passkey value one bit at a time (bnc#1179610 bnc#1186463).
- CVE-2021-34693: net/can/bcm.c allowed local users to obtain sensitive
information from kernel stack memory because parts of a data structure
are uninitialized (bnc#1187452).
- CVE-2020-36385: An issue was discovered in
drivers/infiniband/core/ucma.c has a use-after-free because the ctx is
reached via the ctx_list in some ucma_migrate_id situations where
ucma_close is called, aka CID-f5449e74802c (bnc#1187050).
- CVE-2021-0129: Improper access control in BlueZ may have allowed an
authenticated user to potentially enable information disclosure via
adjacent access (bnc#1186463).
- CVE-2020-36386: An issue was discovered net/bluetooth/hci_event.c has a
slab out-of-bounds read in hci_extended_inquiry_result_evt, aka
CID-51c19bf3d5cf (bnc#1187038).
- CVE-2020-24588: The 802.11 standard that underpins Wi-Fi Protected
Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP)
doesn't
require that the A-MSDU flag in the plaintext QoS header field is
authenticated. Against devices that support receiving non-SSP A-MSDU
frames (which is mandatory as part of 802.11n), an adversary can abuse
this to inject arbitrary network packets (bnc#1185861).
- CVE-2021-33200: kernel/bpf/verifier.c enforced incorrect limits for
pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused
to perform out-of-bounds reads and writes in kernel memory, leading to
local privilege escalation to root. In particular, there is a corner
case where the off reg causes a masking direction change, which then
results in an incorrect final aux->alu_limit (bnc#1186484).

The following non-security bugs were fixed:

- block: do not use blocking queue entered for recursive bio (bsc#1104967).
- s390/stack: fix possible register corruption with stack switch helper
(git-fixes).
- scsi: scsi_dh_alua: Retry RTPG on a different path after failure
(bsc#1174978 bsc#1185701).

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 OpenStack Cloud Crowbar 9:

zypper in -t patch SUSE-OpenStack-Cloud-Crowbar-9-2021-2422=1

- SUSE OpenStack Cloud 9:

zypper in -t patch SUSE-OpenStack-Cloud-9-2021-2422=1

- SUSE Linux Enterprise Server for SAP 12-SP4:

zypper in -t patch SUSE-SLE-SAP-12-SP4-2021-2422=1

- SUSE Linux Enterprise Server 12-SP4-LTSS:

zypper in -t patch SUSE-SLE-SERVER-12-SP4-LTSS-2021-2422=1

- SUSE Linux Enterprise Live Patching 12-SP4:

zypper in -t patch SUSE-SLE-Live-Patching-12-SP4-2021-2422=1

- SUSE Linux Enterprise High Availability 12-SP4:

zypper in -t patch SUSE-SLE-HA-12-SP4-2021-2422=1

Package List:

- SUSE OpenStack Cloud Crowbar 9 (x86_64):

kernel-default-4.12.14-95.80.1
kernel-default-base-4.12.14-95.80.1
kernel-default-base-debuginfo-4.12.14-95.80.1
kernel-default-debuginfo-4.12.14-95.80.1
kernel-default-debugsource-4.12.14-95.80.1
kernel-default-devel-4.12.14-95.80.1
kernel-default-devel-debuginfo-4.12.14-95.80.1
kernel-syms-4.12.14-95.80.1

- SUSE OpenStack Cloud Crowbar 9 (noarch):

kernel-devel-4.12.14-95.80.1
kernel-macros-4.12.14-95.80.1
kernel-source-4.12.14-95.80.1

- SUSE OpenStack Cloud 9 (x86_64):

kernel-default-4.12.14-95.80.1
kernel-default-base-4.12.14-95.80.1
kernel-default-base-debuginfo-4.12.14-95.80.1
kernel-default-debuginfo-4.12.14-95.80.1
kernel-default-debugsource-4.12.14-95.80.1
kernel-default-devel-4.12.14-95.80.1
kernel-default-devel-debuginfo-4.12.14-95.80.1
kernel-syms-4.12.14-95.80.1

- SUSE OpenStack Cloud 9 (noarch):

kernel-devel-4.12.14-95.80.1
kernel-macros-4.12.14-95.80.1
kernel-source-4.12.14-95.80.1

- SUSE Linux Enterprise Server for SAP 12-SP4 (ppc64le x86_64):

kernel-default-4.12.14-95.80.1
kernel-default-base-4.12.14-95.80.1
kernel-default-base-debuginfo-4.12.14-95.80.1
kernel-default-debuginfo-4.12.14-95.80.1
kernel-default-debugsource-4.12.14-95.80.1
kernel-default-devel-4.12.14-95.80.1
kernel-syms-4.12.14-95.80.1

- SUSE Linux Enterprise Server for SAP 12-SP4 (x86_64):

kernel-default-devel-debuginfo-4.12.14-95.80.1

- SUSE Linux Enterprise Server for SAP 12-SP4 (noarch):

kernel-devel-4.12.14-95.80.1
kernel-macros-4.12.14-95.80.1
kernel-source-4.12.14-95.80.1

- SUSE Linux Enterprise Server 12-SP4-LTSS (aarch64 ppc64le s390x x86_64):

kernel-default-4.12.14-95.80.1
kernel-default-base-4.12.14-95.80.1
kernel-default-base-debuginfo-4.12.14-95.80.1
kernel-default-debuginfo-4.12.14-95.80.1
kernel-default-debugsource-4.12.14-95.80.1
kernel-default-devel-4.12.14-95.80.1
kernel-syms-4.12.14-95.80.1

- SUSE Linux Enterprise Server 12-SP4-LTSS (x86_64):

kernel-default-devel-debuginfo-4.12.14-95.80.1

- SUSE Linux Enterprise Server 12-SP4-LTSS (noarch):

kernel-devel-4.12.14-95.80.1
kernel-macros-4.12.14-95.80.1
kernel-source-4.12.14-95.80.1

- SUSE Linux Enterprise Server 12-SP4-LTSS (s390x):

kernel-default-man-4.12.14-95.80.1

- SUSE Linux Enterprise Live Patching 12-SP4 (ppc64le s390x x86_64):

kernel-default-kgraft-4.12.14-95.80.1
kernel-default-kgraft-devel-4.12.14-95.80.1
kgraft-patch-4_12_14-95_80-default-1-6.3.1

- SUSE Linux Enterprise High Availability 12-SP4 (ppc64le s390x x86_64):

cluster-md-kmp-default-4.12.14-95.80.1
cluster-md-kmp-default-debuginfo-4.12.14-95.80.1
dlm-kmp-default-4.12.14-95.80.1
dlm-kmp-default-debuginfo-4.12.14-95.80.1
gfs2-kmp-default-4.12.14-95.80.1
gfs2-kmp-default-debuginfo-4.12.14-95.80.1
kernel-default-debuginfo-4.12.14-95.80.1
kernel-default-debugsource-4.12.14-95.80.1
ocfs2-kmp-default-4.12.14-95.80.1
ocfs2-kmp-default-debuginfo-4.12.14-95.80.1

References:

https://www.suse.com/security/cve/CVE-2020-24588.html
https://www.suse.com/security/cve/CVE-2020-26558.html
https://www.suse.com/security/cve/CVE-2020-36385.html
https://www.suse.com/security/cve/CVE-2020-36386.html
https://www.suse.com/security/cve/CVE-2021-0129.html
https://www.suse.com/security/cve/CVE-2021-0512.html
https://www.suse.com/security/cve/CVE-2021-0605.html
https://www.suse.com/security/cve/CVE-2021-22555.html
https://www.suse.com/security/cve/CVE-2021-33200.html
https://www.suse.com/security/cve/CVE-2021-33624.html
https://www.suse.com/security/cve/CVE-2021-33909.html
https://www.suse.com/security/cve/CVE-2021-34693.html
https://www.suse.com/security/cve/CVE-2021-3609.html
https://bugzilla.suse.com/1104967
https://bugzilla.suse.com/1174978
https://bugzilla.suse.com/1179610
https://bugzilla.suse.com/1185701
https://bugzilla.suse.com/1185861
https://bugzilla.suse.com/1186463
https://bugzilla.suse.com/1186484
https://bugzilla.suse.com/1187038
https://bugzilla.suse.com/1187050
https://bugzilla.suse.com/1187215
https://bugzilla.suse.com/1187452
https://bugzilla.suse.com/1187554
https://bugzilla.suse.com/1187595
https://bugzilla.suse.com/1187601
https://bugzilla.suse.com/1187934
https://bugzilla.suse.com/1188062
https://bugzilla.suse.com/1188116