SUSE SLES12 Security Update : kernel (SUSE-SU-2018:0031-1) (Meltdown) (Spectre)

High Nessus Plugin ID 105647

Synopsis

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

Description

The SUSE Linux Enterprise 12 SP1 LTSS kernel was updated to receive various security and bugfixes. This update adds mitigations for various side channel attacks against modern CPUs that could disclose content of otherwise unreadable memory (bnc#1068032).

- CVE-2017-5753 / 'SpectreAttack': Local attackers on systems with modern CPUs featuring deep instruction pipelining could use attacker controllable speculative execution over code patterns in the Linux Kernel to leak content from otherwise not readable memory in the same address space, allowing retrieval of passwords, cryptographic keys and other secrets. This problem is mitigated by adding speculative fencing on affected code paths throughout the Linux kernel. This issue is addressed for the x86_64, IBM Power and IBM zSeries architecture.

- CVE-2017-5715 / 'SpectreAttack': Local attackers on systems with modern CPUs featuring branch prediction could use mispredicted branches to speculatively execute code patterns that in turn could be made to leak other non-readable content in the same address space, an attack similar to CVE-2017-5753. This problem is mitigated by disabling predictive branches, depending on CPU architecture either by firmware updates and/or fixes in the user-kernel privilege boundaries. This is done with help of Linux Kernel fixes on the Intel/AMD x86_64 and IBM zSeries architectures. On x86_64, this requires also updates of the CPU microcode packages, delivered in separate updates. For IBM Power and zSeries the required firmware updates are supplied over regular channels by IBM. As this feature can have a performance impact, it can be disabled using the 'nospec' kernel commandline option.

- CVE-2017-5754 / 'MeltdownAttack': Local attackers on systems with modern CPUs featuring deep instruction pipelining could use code patterns in userspace to speculative executive code that would read otherwise read protected memory, an attack similar to CVE-2017-5753. This problem is mitigated by unmapping the Linux Kernel from the user address space during user code execution, following a approach called 'KAISER'.
The terms used here are 'KAISER' / 'Kernel Address Isolation' and 'PTI' / 'Page Table Isolation'. This update does this on the x86_64 architecture, it is not required on the IBM zSeries architecture. This feature can be enabled / disabled by the 'pti=[on|off|auto]' or 'nopti' commandline options. The following security bugs were fixed :

- CVE-2017-15868: The bnep_add_connection function in net/bluetooth/bnep/core.c in the Linux kernel did not ensure that an l2cap socket is available, which allowed local users to gain privileges via a crafted application (bnc#1071470).

- CVE-2017-13167: An elevation of privilege vulnerability in the kernel sound timer. (bnc#1072876).

- CVE-2017-16538: drivers/media/usb/dvb-usb-v2/lmedm04.c in the Linux kernel allowed local users to cause a denial of service (general protection fault and system crash) or possibly have unspecified other impact via a crafted USB device, related to a missing warm-start check and incorrect attach timing (dm04_lme2510_frontend_attach versus dm04_lme2510_tuner) (bnc#1066569).

- CVE-2017-17558: The usb_destroy_configuration function in drivers/usb/core/config.c in the USB core subsystem in the Linux kernel did not consider the maximum number of configurations and interfaces before attempting to release resources, which allowed local users to cause a denial of service (out-of-bounds write access) or possibly have unspecified other impact via a crafted USB device (bnc#1072561).

- CVE-2017-17450: net/netfilter/xt_osf.c in the Linux kernel did not require the CAP_NET_ADMIN capability for add_callback and remove_callback operations, which allowed local users to bypass intended access restrictions because the xt_osf_fingers data structure is shared across all net namespaces (bnc#1071695).

- CVE-2017-17449: The __netlink_deliver_tap_skb function in net/netlink/af_netlink.c in the Linux kernel through 4.14.4, when CONFIG_NLMON is enabled, did not restrict observations of Netlink messages to a single net namespace, which allowed local users to obtain sensitive information by leveraging the CAP_NET_ADMIN capability to sniff an nlmon interface for all Netlink activity on the system (bnc#1071694).

- CVE-2017-17448: net/netfilter/nfnetlink_cthelper.c in the Linux kernel did not require the CAP_NET_ADMIN capability for new, get, and del operations, which allowed local users to bypass intended access restrictions because the nfnl_cthelper_list data structure is shared across all net namespaces (bnc#1071693).

- CVE-2017-8824: The dccp_disconnect function in net/dccp/proto.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (use-after-free) via an AF_UNSPEC connect system call during the DCCP_LISTEN state (bnc#1070771).

- CVE-2017-15115: The sctp_do_peeloff function in net/sctp/socket.c in the Linux kernel did not check whether the intended netns is used in a peel-off action, which allowed local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via crafted system calls (bnc#1068671).

- CVE-2017-11600: net/xfrm/xfrm_policy.c in the Linux kernel through 4.12.3, when CONFIG_XFRM_MIGRATE is enabled, did not ensure that the dir value of xfrm_userpolicy_id is XFRM_POLICY_MAX or less, which allowed local users to cause a denial of service (out-of-bounds access) or possibly have unspecified other impact via an XFRM_MSG_MIGRATE xfrm Netlink message (bnc#1050231).

- CVE-2017-16534: The cdc_parse_cdc_header function in drivers/usb/core/message.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#1066693).

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 YaST online_update.
Alternatively you can run the command listed for your product :

SUSE OpenStack Cloud 6:zypper in -t patch SUSE-OpenStack-Cloud-6-2018-24=1

SUSE Linux Enterprise Server for SAP 12-SP1:zypper in -t patch SUSE-SLE-SAP-12-SP1-2018-24=1

SUSE Linux Enterprise Server 12-SP1-LTSS:zypper in -t patch SUSE-SLE-SERVER-12-SP1-2018-24=1

SUSE Linux Enterprise Module for Public Cloud 12:zypper in -t patch SUSE-SLE-Module-Public-Cloud-12-2018-24=1

To bring your system up-to-date, use 'zypper patch'.

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1012422

https://bugzilla.suse.com/show_bug.cgi?id=1045205

https://bugzilla.suse.com/show_bug.cgi?id=1050231

https://bugzilla.suse.com/show_bug.cgi?id=1066569

https://bugzilla.suse.com/show_bug.cgi?id=1066693

https://bugzilla.suse.com/show_bug.cgi?id=1067678

https://bugzilla.suse.com/show_bug.cgi?id=1068032

https://bugzilla.suse.com/show_bug.cgi?id=1068671

https://bugzilla.suse.com/show_bug.cgi?id=1070771

https://bugzilla.suse.com/show_bug.cgi?id=1070781

https://bugzilla.suse.com/show_bug.cgi?id=1071074

https://bugzilla.suse.com/show_bug.cgi?id=1071470

https://bugzilla.suse.com/show_bug.cgi?id=1071693

https://bugzilla.suse.com/show_bug.cgi?id=1071694

https://bugzilla.suse.com/show_bug.cgi?id=1071695

https://bugzilla.suse.com/show_bug.cgi?id=1072561

https://bugzilla.suse.com/show_bug.cgi?id=1072876

https://www.suse.com/security/cve/CVE-2017-11600/

https://www.suse.com/security/cve/CVE-2017-13167/

https://www.suse.com/security/cve/CVE-2017-15115/

https://www.suse.com/security/cve/CVE-2017-15868/

https://www.suse.com/security/cve/CVE-2017-16534/

https://www.suse.com/security/cve/CVE-2017-16538/

https://www.suse.com/security/cve/CVE-2017-17448/

https://www.suse.com/security/cve/CVE-2017-17449/

https://www.suse.com/security/cve/CVE-2017-17450/

https://www.suse.com/security/cve/CVE-2017-17558/

https://www.suse.com/security/cve/CVE-2017-5715/

https://www.suse.com/security/cve/CVE-2017-5753/

https://www.suse.com/security/cve/CVE-2017-5754/

https://www.suse.com/security/cve/CVE-2017-8824/

http://www.nessus.org/u?31b5dbbf

Plugin Details

Severity: High

ID: 105647

File Name: suse_SU-2018-0031-1.nasl

Version: 3.8

Type: local

Agent: unix

Published: 2018/01/08

Updated: 2018/12/01

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

Temporal Score: 6.3

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

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

CVSS v3.0

Base Score: 7.8

Temporal Score: 7.5

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

Temporal Vector: CVSS:3.0/E:H/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-man, p-cpe:/a:novell:suse_linux:kernel-syms, p-cpe:/a:novell:suse_linux:kernel-xen, p-cpe:/a:novell:suse_linux:kernel-xen-base, p-cpe:/a:novell:suse_linux:kernel-xen-base-debuginfo, p-cpe:/a:novell:suse_linux:kernel-xen-debuginfo, p-cpe:/a:novell:suse_linux:kernel-xen-debugsource, p-cpe:/a:novell:suse_linux:kernel-xen-devel, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_69-default, p-cpe:/a:novell:suse_linux:kgraft-patch-3_12_74-60_64_69-xen, cpe:/o:novell:suse_linux:12

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/01/05

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2017-11600, CVE-2017-13167, CVE-2017-15115, CVE-2017-15868, CVE-2017-16534, CVE-2017-16538, CVE-2017-17448, CVE-2017-17449, CVE-2017-17450, CVE-2017-17558, CVE-2017-5715, CVE-2017-5753, CVE-2017-5754, CVE-2017-8824

IAVA: 2018-A-0019, 2018-A-0020