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AUSCERT External Security Bulletin Redistribution
ESB-2021.4076
Security update for the Linux Kernel
2 December 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Linux Kernel
Publisher: SUSE
Operating System: SUSE
Impact/Access: Root Compromise -- Existing Account
Create Arbitrary Files -- Existing Account
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Existing Account
Reduced Security -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-43389 CVE-2021-42739 CVE-2021-42008
CVE-2021-38198 CVE-2021-38160 CVE-2021-37159
CVE-2021-33033 CVE-2021-20265 CVE-2021-3772
CVE-2021-3679 CVE-2021-3655 CVE-2021-3653
CVE-2021-3640 CVE-2021-3609 CVE-2021-3542
CVE-2020-36385 CVE-2014-7841
Reference: ESB-2021.4040
ESB-2021.4031
ESB-2021.4030
Original Bulletin:
https://www.suse.com/support/update/announcement/2021/suse-su-202114849-1
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SUSE Security Update: Security update for the Linux Kernel
______________________________________________________________________________
Announcement ID: SUSE-SU-2021:14849-1
Rating: important
References: #1183089 #1184673 #1186109 #1187050 #1187215 #1188172
#1188563 #1188601 #1188876 #1189057 #1189262 #1189399
#1190117 #1190351 #1191315 #1191660 #1191958 #1192036
#1192267 #904899 #905100
Cross-References: CVE-2014-7841 CVE-2020-36385 CVE-2021-20265 CVE-2021-33033
CVE-2021-3542 CVE-2021-3609 CVE-2021-3640 CVE-2021-3653
CVE-2021-3655 CVE-2021-3679 CVE-2021-37159 CVE-2021-3772
CVE-2021-38160 CVE-2021-38198 CVE-2021-42008 CVE-2021-42739
CVE-2021-43389
Affected Products:
SUSE Linux Enterprise Server 11-SP4-LTSS
SUSE Linux Enterprise Server 11-EXTRA
SUSE Linux Enterprise Debuginfo 11-SP4
______________________________________________________________________________
An update that solves 17 vulnerabilities and has four fixes is now available.
Description:
The SUSE Linux Enterprise 11 SP4 LTSS kernel was updated to receive various
security and bugfixes.
The following security bugs were fixed:
o CVE-2021-37159: hso_free_net_device in drivers/net/usb/hso.c called
unregister_netdev without checking for the NETREG_REGISTERED state, leading
to a use-after-free and a double free (bnc#1188601).
o CVE-2021-3772: Fixed sctp vtag check in sctp_sf_ootb (bsc#1190351).
o CVE-2021-3655: Missing size validations on inbound SCTP packets may have
allowed the kernel to read uninitialized memory (bnc#1188563 bnc#1192267).
o CVE-2014-7841: The sctp_process_param function in net/sctp/sm_make_chunk.c
in the SCTP implementation, when ASCONF is used, allowed remote attackers
to cause a denial of service (NULL pointer dereference and system crash)
via a malformed INIT chunk (bnc#904899 bnc#905100).
o CVE-2021-20265: A flaw was found in the way memory resources were freed in
the unix_stream_recvmsg function when a signal was pending. This flaw
allowed an unprivileged local user to crash the system by exhausting
available memory. The highest threat from this vulnerability is to system
availability (bnc#1183089).
o CVE-2021-42739: The firewire subsystem had a buffer overflow related to
drivers/media/firewire/firedtv-avc.c and drivers/media/firewire/
firedtv-ci.c, because avc_ca_pmt mishandled bounds checking (bnc#1184673
bnc#1192036).
o CVE-2021-33033: The Linux kernel has a use-after-free in cipso_v4_genopt in
net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI
definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an
arbitrary value (bnc#1186109 bnc#1188876).
o CVE-2021-43389: There was an array-index-out-of-bounds flaw in the
detach_capi_ctr function in drivers/isdn/capi/kcapi.c (bnc#1191958).
o CVE-2021-42008: The decode_data function in drivers/net/hamradio/6pack.c
had a slab out-of-bounds write. Input from a process that has the
CAP_NET_ADMIN capability can lead to root access (bnc#1191315).
o CVE-2021-38160: Data corruption or loss could be triggered by an untrusted
device that supplies a buf->len value exceeding the buffer size in drivers/
char/virtio_console.c (bsc#1190117)
o CVE-2021-3640: Fixed a Use-After-Free vulnerability in function
sco_sock_sendmsg() in the bluetooth stack (bsc#1188172).
o CVE-2021-38198: arch/x86/kvm/mmu/paging_tmpl.h incorrectly computed the
access permissions of a shadow page, leading to a missing guest protection
page fault (bnc#1189262).
o CVE-2021-3653: A flaw was found in the KVM's AMD code for supporting SVM
nested virtualization. The flaw occurs when processing the VMCB (virtual
machine control block) provided by the L1 guest to spawn/handle a nested
guest (L2). Due to improper validation of the "int_ctl" field, this issue
could allow a malicious L1 to enable AVIC support (Advanced Virtual
Interrupt Controller) for the L2 guest. As a result, the L2 guest would be
allowed to read/write physical pages of the host, resulting in a crash of
the entire system, leak of sensitive data or potential guest-to-host
escape. (bnc#1189399).
o CVE-2021-3679: A lack of CPU resource in the Linux kernel tracing module
functionality was found in the way user uses trace ring buffer in a
specific way. Only privileged local users (with CAP_SYS_ADMIN capability)
could use this flaw to starve the resources causing denial of service (bnc#
1189057).
o CVE-2021-3609: A potential local privilege escalation in the CAN BCM
networking protocol was fixed (bsc#1187215).
o CVE-2020-36385: 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).
The following non-security bugs were fixed:
o sctp: check asoc peer.asconf_capable before processing asconf (bsc#
1190351).
o sctp: fully initialize v4 addr in some functions (bsc#1188563).
o sctp: simplify addr copy (bsc#1188563).
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:
o SUSE Linux Enterprise Server 11-SP4-LTSS:
zypper in -t patch slessp4-kernel-14849=1
o SUSE Linux Enterprise Server 11-EXTRA:
zypper in -t patch slexsp3-kernel-14849=1
o SUSE Linux Enterprise Debuginfo 11-SP4:
zypper in -t patch dbgsp4-kernel-14849=1
Package List:
o SUSE Linux Enterprise Server 11-SP4-LTSS (i586 ppc64 s390x x86_64):
kernel-default-3.0.101-108.132.1
kernel-default-base-3.0.101-108.132.1
kernel-default-devel-3.0.101-108.132.1
kernel-source-3.0.101-108.132.1
kernel-syms-3.0.101-108.132.1
kernel-trace-3.0.101-108.132.1
kernel-trace-base-3.0.101-108.132.1
kernel-trace-devel-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-SP4-LTSS (i586 x86_64):
kernel-ec2-3.0.101-108.132.1
kernel-ec2-base-3.0.101-108.132.1
kernel-ec2-devel-3.0.101-108.132.1
kernel-xen-3.0.101-108.132.1
kernel-xen-base-3.0.101-108.132.1
kernel-xen-devel-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-SP4-LTSS (ppc64):
kernel-bigmem-3.0.101-108.132.1
kernel-bigmem-base-3.0.101-108.132.1
kernel-bigmem-devel-3.0.101-108.132.1
kernel-ppc64-3.0.101-108.132.1
kernel-ppc64-base-3.0.101-108.132.1
kernel-ppc64-devel-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-SP4-LTSS (s390x):
kernel-default-man-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-SP4-LTSS (i586):
kernel-pae-3.0.101-108.132.1
kernel-pae-base-3.0.101-108.132.1
kernel-pae-devel-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-EXTRA (i586 ia64 ppc64 s390x x86_64):
kernel-default-extra-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-EXTRA (i586 x86_64):
kernel-xen-extra-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-EXTRA (x86_64):
kernel-trace-extra-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-EXTRA (ppc64):
kernel-ppc64-extra-3.0.101-108.132.1
o SUSE Linux Enterprise Server 11-EXTRA (i586):
kernel-pae-extra-3.0.101-108.132.1
o SUSE Linux Enterprise Debuginfo 11-SP4 (i586 ppc64 s390x x86_64):
kernel-default-debuginfo-3.0.101-108.132.1
kernel-default-debugsource-3.0.101-108.132.1
kernel-trace-debuginfo-3.0.101-108.132.1
kernel-trace-debugsource-3.0.101-108.132.1
o SUSE Linux Enterprise Debuginfo 11-SP4 (i586 s390x x86_64):
kernel-default-devel-debuginfo-3.0.101-108.132.1
kernel-trace-devel-debuginfo-3.0.101-108.132.1
o SUSE Linux Enterprise Debuginfo 11-SP4 (i586 x86_64):
kernel-ec2-debuginfo-3.0.101-108.132.1
kernel-ec2-debugsource-3.0.101-108.132.1
kernel-xen-debuginfo-3.0.101-108.132.1
kernel-xen-debugsource-3.0.101-108.132.1
kernel-xen-devel-debuginfo-3.0.101-108.132.1
o SUSE Linux Enterprise Debuginfo 11-SP4 (ppc64):
kernel-bigmem-debuginfo-3.0.101-108.132.1
kernel-bigmem-debugsource-3.0.101-108.132.1
kernel-ppc64-debuginfo-3.0.101-108.132.1
kernel-ppc64-debugsource-3.0.101-108.132.1
o SUSE Linux Enterprise Debuginfo 11-SP4 (i586):
kernel-pae-debuginfo-3.0.101-108.132.1
kernel-pae-debugsource-3.0.101-108.132.1
kernel-pae-devel-debuginfo-3.0.101-108.132.1
References:
o https://www.suse.com/security/cve/CVE-2014-7841.html
o https://www.suse.com/security/cve/CVE-2020-36385.html
o https://www.suse.com/security/cve/CVE-2021-20265.html
o https://www.suse.com/security/cve/CVE-2021-33033.html
o https://www.suse.com/security/cve/CVE-2021-3542.html
o https://www.suse.com/security/cve/CVE-2021-3609.html
o https://www.suse.com/security/cve/CVE-2021-3640.html
o https://www.suse.com/security/cve/CVE-2021-3653.html
o https://www.suse.com/security/cve/CVE-2021-3655.html
o https://www.suse.com/security/cve/CVE-2021-3679.html
o https://www.suse.com/security/cve/CVE-2021-37159.html
o https://www.suse.com/security/cve/CVE-2021-3772.html
o https://www.suse.com/security/cve/CVE-2021-38160.html
o https://www.suse.com/security/cve/CVE-2021-38198.html
o https://www.suse.com/security/cve/CVE-2021-42008.html
o https://www.suse.com/security/cve/CVE-2021-42739.html
o https://www.suse.com/security/cve/CVE-2021-43389.html
o https://bugzilla.suse.com/1183089
o https://bugzilla.suse.com/1184673
o https://bugzilla.suse.com/1186109
o https://bugzilla.suse.com/1187050
o https://bugzilla.suse.com/1187215
o https://bugzilla.suse.com/1188172
o https://bugzilla.suse.com/1188563
o https://bugzilla.suse.com/1188601
o https://bugzilla.suse.com/1188876
o https://bugzilla.suse.com/1189057
o https://bugzilla.suse.com/1189262
o https://bugzilla.suse.com/1189399
o https://bugzilla.suse.com/1190117
o https://bugzilla.suse.com/1190351
o https://bugzilla.suse.com/1191315
o https://bugzilla.suse.com/1191660
o https://bugzilla.suse.com/1191958
o https://bugzilla.suse.com/1192036
o https://bugzilla.suse.com/1192267
o https://bugzilla.suse.com/904899
o https://bugzilla.suse.com/905100
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