SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2019:1855-1) (SACK Slowness)

High Nessus Plugin ID 126744

Synopsis

The remote SUSE host is missing one or more security updates.

Description

The SUSE Linux Enterprise 15 kernel version 4.12.14 was updated to receive various security and bugfixes.

The following security bugs were fixed :

CVE-2019-10638: Attackers used to be able to track the Linux kernel by the IP ID values the kernel produces for connection-less protocols.
When such traffic was sent to multiple destination IP addresses, it was possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack could have been conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses. [bnc#1140575]

CVE-2019-10639: The Linux kernel used to allow Information Exposure (partial kernel address disclosure), leading to a KASLR bypass.
Specifically, it was possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols. When such traffic was sent to multiple destination IP addresses, it was possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key was extracted (via enumeration), the offset of the kernel image was exposed. This attack could be carried out remotely by the attacker forcing the target device to send UDP or ICMP traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server.
ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses. [bnc#1140577]

CVE-2018-20836: A race condition used to exist in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free. [bnc#1134395]

CVE-2019-10126: A heap-based buffer overflow in the wireless driver code was fixed. This issue might have lead to memory corruption and possibly other consequences. [bnc#1136935]

CVE-2019-11599: The coredump implementation did not use locking or other mechanisms to prevent vma layout or vma flags changes while it ran, which allowed local users to obtain sensitive information, cause a denial of service, or possibly have unspecified other impact by triggering a race condition with mmget_not_zero or get_task_mm calls.
[bnc#1131645].

CVE-2019-12614: There was an unchecked kstrdup of prop->name on PowerPC platforms, which allowed an attacker to cause a denial of service (NULL pointer dereference and system crash). [bnc#1137194]

CVE-2018-16871: A flaw was found in the NFS implementation. An attacker who was able to mount an exported NFS filesystem was able to trigger a NULL pointer dereference by an invalid NFS sequence. This could panic the machine and deny access to the NFS server. Any outstanding disk writes to the NFS server will were lost.
[bnc#1137103]

CVE-2019-12819: The function __mdiobus_register() used to call put_device(), which would trigger a fixed_mdio_bus_init use-after-free error. This would cause a denial of service. [bnc#1138291]

CVE-2019-12818: The nfc_llcp_build_tlv function in net/nfc/llcp_commands.c may return NULL. If the caller did not check for this, it could trigger a NULL pointer dereference. This would cause denial of service. [bnc#1138293]

CVE-2019-12456: An issue in the MPT3COMMAND case in _ctl_ioctl_main() allowed local users to cause a denial of service or possibly have unspecified other impact by changing the value of ioc_number between two kernel reads of that value, aka a 'double fetch' vulnerability.
[bsc#1136922]

CVE-2019-12380: An issue was in the EFI subsystem existed that mishandled memory allocation failures. Note, however, that all relevant code runs only at boot-time, before any user processes are started. Therefore, there was no possibility for an unprivileged user to exploit this issue. [bnc#1136598]

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

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 Workstation Extension 15:zypper in -t patch SUSE-SLE-Product-WE-15-2019-1855=1

SUSE Linux Enterprise Module for Open Buildservice Development Tools 15:zypper in -t patch SUSE-SLE-Module-Development-Tools-OBS-15-2019-1855=1

SUSE Linux Enterprise Module for Live Patching 15:zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2019-1855=1

SUSE Linux Enterprise Module for Legacy Software 15:zypper in -t patch SUSE-SLE-Module-Legacy-15-2019-1855=1

SUSE Linux Enterprise Module for Development Tools 15:zypper in -t patch SUSE-SLE-Module-Development-Tools-15-2019-1855=1

SUSE Linux Enterprise Module for Basesystem 15:zypper in -t patch SUSE-SLE-Module-Basesystem-15-2019-1855=1

SUSE Linux Enterprise High Availability 15:zypper in -t patch SUSE-SLE-Product-HA-15-2019-1855=1

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1051510

https://bugzilla.suse.com/show_bug.cgi?id=1061840

https://bugzilla.suse.com/show_bug.cgi?id=1065600

https://bugzilla.suse.com/show_bug.cgi?id=1071995

https://bugzilla.suse.com/show_bug.cgi?id=1088047

https://bugzilla.suse.com/show_bug.cgi?id=1094555

https://bugzilla.suse.com/show_bug.cgi?id=1098633

https://bugzilla.suse.com/show_bug.cgi?id=1106383

https://bugzilla.suse.com/show_bug.cgi?id=1106751

https://bugzilla.suse.com/show_bug.cgi?id=1109137

https://bugzilla.suse.com/show_bug.cgi?id=1114279

https://bugzilla.suse.com/show_bug.cgi?id=1119532

https://bugzilla.suse.com/show_bug.cgi?id=1120423

https://bugzilla.suse.com/show_bug.cgi?id=1124167

https://bugzilla.suse.com/show_bug.cgi?id=1127155

https://bugzilla.suse.com/show_bug.cgi?id=1128432

https://bugzilla.suse.com/show_bug.cgi?id=1128902

https://bugzilla.suse.com/show_bug.cgi?id=1128910

https://bugzilla.suse.com/show_bug.cgi?id=1131645

https://bugzilla.suse.com/show_bug.cgi?id=1132154

https://bugzilla.suse.com/show_bug.cgi?id=1132390

https://bugzilla.suse.com/show_bug.cgi?id=1133401

https://bugzilla.suse.com/show_bug.cgi?id=1133738

https://bugzilla.suse.com/show_bug.cgi?id=1134303

https://bugzilla.suse.com/show_bug.cgi?id=1134395

https://bugzilla.suse.com/show_bug.cgi?id=1135296

https://bugzilla.suse.com/show_bug.cgi?id=1135556

https://bugzilla.suse.com/show_bug.cgi?id=1135642

https://bugzilla.suse.com/show_bug.cgi?id=1136157

https://bugzilla.suse.com/show_bug.cgi?id=1136598

https://bugzilla.suse.com/show_bug.cgi?id=1136922

https://bugzilla.suse.com/show_bug.cgi?id=1136935

https://bugzilla.suse.com/show_bug.cgi?id=1137103

https://bugzilla.suse.com/show_bug.cgi?id=1137194

https://bugzilla.suse.com/show_bug.cgi?id=1137429

https://bugzilla.suse.com/show_bug.cgi?id=1137625

https://bugzilla.suse.com/show_bug.cgi?id=1137728

https://bugzilla.suse.com/show_bug.cgi?id=1137884

https://bugzilla.suse.com/show_bug.cgi?id=1137995

https://bugzilla.suse.com/show_bug.cgi?id=1137996

https://bugzilla.suse.com/show_bug.cgi?id=1137998

https://bugzilla.suse.com/show_bug.cgi?id=1137999

https://bugzilla.suse.com/show_bug.cgi?id=1138000

https://bugzilla.suse.com/show_bug.cgi?id=1138002

https://bugzilla.suse.com/show_bug.cgi?id=1138003

https://bugzilla.suse.com/show_bug.cgi?id=1138005

https://bugzilla.suse.com/show_bug.cgi?id=1138006

https://bugzilla.suse.com/show_bug.cgi?id=1138007

https://bugzilla.suse.com/show_bug.cgi?id=1138008

https://bugzilla.suse.com/show_bug.cgi?id=1138009

https://bugzilla.suse.com/show_bug.cgi?id=1138010

https://bugzilla.suse.com/show_bug.cgi?id=1138011

https://bugzilla.suse.com/show_bug.cgi?id=1138012

https://bugzilla.suse.com/show_bug.cgi?id=1138013

https://bugzilla.suse.com/show_bug.cgi?id=1138014

https://bugzilla.suse.com/show_bug.cgi?id=1138015

https://bugzilla.suse.com/show_bug.cgi?id=1138016

https://bugzilla.suse.com/show_bug.cgi?id=1138017

https://bugzilla.suse.com/show_bug.cgi?id=1138018

https://bugzilla.suse.com/show_bug.cgi?id=1138019

https://bugzilla.suse.com/show_bug.cgi?id=1138291

https://bugzilla.suse.com/show_bug.cgi?id=1138293

https://bugzilla.suse.com/show_bug.cgi?id=1138374

https://bugzilla.suse.com/show_bug.cgi?id=1138375

https://bugzilla.suse.com/show_bug.cgi?id=1138589

https://bugzilla.suse.com/show_bug.cgi?id=1138719

https://bugzilla.suse.com/show_bug.cgi?id=1139751

https://bugzilla.suse.com/show_bug.cgi?id=1139771

https://bugzilla.suse.com/show_bug.cgi?id=1139782

https://bugzilla.suse.com/show_bug.cgi?id=1139865

https://bugzilla.suse.com/show_bug.cgi?id=1140133

https://bugzilla.suse.com/show_bug.cgi?id=1140328

https://bugzilla.suse.com/show_bug.cgi?id=1140405

https://bugzilla.suse.com/show_bug.cgi?id=1140424

https://bugzilla.suse.com/show_bug.cgi?id=1140428

https://bugzilla.suse.com/show_bug.cgi?id=1140575

https://bugzilla.suse.com/show_bug.cgi?id=1140577

https://bugzilla.suse.com/show_bug.cgi?id=1140637

https://bugzilla.suse.com/show_bug.cgi?id=1140658

https://bugzilla.suse.com/show_bug.cgi?id=1140715

https://bugzilla.suse.com/show_bug.cgi?id=1140719

https://bugzilla.suse.com/show_bug.cgi?id=1140726

https://bugzilla.suse.com/show_bug.cgi?id=1140727

https://bugzilla.suse.com/show_bug.cgi?id=1140728

https://bugzilla.suse.com/show_bug.cgi?id=1140814

https://www.suse.com/security/cve/CVE-2018-16871/

https://www.suse.com/security/cve/CVE-2018-20836/

https://www.suse.com/security/cve/CVE-2019-10126/

https://www.suse.com/security/cve/CVE-2019-10638/

https://www.suse.com/security/cve/CVE-2019-10639/

https://www.suse.com/security/cve/CVE-2019-11478/

https://www.suse.com/security/cve/CVE-2019-11599/

https://www.suse.com/security/cve/CVE-2019-12380/

https://www.suse.com/security/cve/CVE-2019-12456/

https://www.suse.com/security/cve/CVE-2019-12614/

https://www.suse.com/security/cve/CVE-2019-12818/

https://www.suse.com/security/cve/CVE-2019-12819/

http://www.nessus.org/u?f0271507

Plugin Details

Severity: High

ID: 126744

File Name: suse_SU-2019-1855-1.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2019/07/16

Updated: 2019/09/10

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 9.3

Temporal Score: 7.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:kernel-default, p-cpe:/a:novell:suse_linux:kernel-default-base, p-cpe:/a:novell:suse_linux:kernel-default-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-debugsource, p-cpe:/a:novell:suse_linux:kernel-default-devel, p-cpe:/a:novell:suse_linux:kernel-default-devel-debuginfo, p-cpe:/a:novell:suse_linux:kernel-default-man, p-cpe:/a:novell:suse_linux:kernel-obs-build, p-cpe:/a:novell:suse_linux:kernel-obs-build-debugsource, p-cpe:/a:novell:suse_linux:kernel-obs-qa, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kernel-vanilla-base, p-cpe:/a:novell:suse_linux:kernel-vanilla-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-vanilla-debuginfo, p-cpe:/a:novell:suse_linux:kernel-vanilla-debugsource, p-cpe:/a:novell:suse_linux:kernel-zfcpdump, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debuginfo, p-cpe:/a:novell:suse_linux:kernel-zfcpdump-debugsource, p-cpe:/a:novell:suse_linux:kselftests-kmp-default, p-cpe:/a:novell:suse_linux:kselftests-kmp-default-debuginfo, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default, p-cpe:/a:novell:suse_linux:reiserfs-kmp-default-debuginfo, cpe:/o:novell:suse_linux:15

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2019/07/15

Vulnerability Publication Date: 2019/04/29

Reference Information

CVE: CVE-2018-16871, CVE-2018-20836, CVE-2019-10126, CVE-2019-10638, CVE-2019-10639, CVE-2019-11478, CVE-2019-11599, CVE-2019-12380, CVE-2019-12456, CVE-2019-12614, CVE-2019-12818, CVE-2019-12819