SUSE SLES11 Security Update : xen (SUSE-SU-2018:2528-1) (Foreshadow) (Meltdown) (Spectre)

High Nessus Plugin ID 112147

Synopsis

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

Description

This update for xen fixes the following issues: These security issue were fixed :

- CVE-2018-3646: Systems with microprocessors utilizing speculative execution and address translations may have allowed unauthorized disclosure of information residing in the L1 data cache to an attacker with local user access with guest OS privilege via a terminal page fault and a side-channel analysis (bsc#1091107, bsc#1027519).

- CVE-2018-12617: An integer overflow that could cause a segmentation fault in qmp_guest_file_read() with g_malloc() in qemu-guest-agent was fixed (bsc#1098744)

- CVE-2018-3665: System software utilizing Lazy FP state restore technique on systems using Intel Core-based microprocessors may potentially allow a local process to infer data from another process through a speculative execution side channel. (bsc#1095242)

- CVE-2018-3639: Systems with microprocessors utilizing speculative execution and speculative execution of memory reads before the addresses of all prior memory writes are known may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka Speculative Store Bypass (SSB), Variant 4. (bsc#1092631)

- CVE-2017-5715: Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis. (bsc#1074562)

- CVE-2017-5753: Systems with microprocessors utilizing speculative execution and branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis.
(bsc#1074562)

- CVE-2017-5754: Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis of the data cache. (bsc#1074562)

- CVE-2018-12891: Certain PV MMU operations may take a long time to process. For that reason Xen explicitly checks for the need to preempt the current vCPU at certain points. A few rarely taken code paths did bypass such checks. By suitably enforcing the conditions through its own page table contents, a malicious guest may cause such bypasses to be used for an unbounded number of iterations. A malicious or buggy PV guest may cause a Denial of Service (DoS) affecting the entire host. Specifically, it may prevent use of a physical CPU for an indeterminate period of time. (bsc#1097521)

- CVE-2018-12893: One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest.
A malicious PV guest can crash Xen, leading to a Denial of Service. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users. (bsc#1097522)

- CVE-2018-11806: m_cat in slirp/mbuf.c in Qemu has a heap-based buffer overflow via incoming fragmented datagrams. (bsc#1096224)

- CVE-2018-10982: An issue was discovered in Xen allowed x86 HVM guest OS users to cause a denial of service (unexpectedly high interrupt number, array overrun, and hypervisor crash) or possibly gain hypervisor privileges by setting up an HPET timer to deliver interrupts in IO-APIC mode, aka vHPET interrupt injection.
(bsc#1090822)

- CVE-2018-10981: An issue was discovered in Xen that allowed x86 HVM guest OS users to cause a denial of service (host OS infinite loop) in situations where a QEMU device model attempts to make invalid transitions between states of a request. (bsc#1090823) Following bugs were fixed :

- After updating to kernel 3.0.101-0.47.106.32-xen system crashes in check_bugs() (bsc#1097206)

- bsc#1079730 - in xen-kmp, unplug emulated devices after migration This is required since xen-4.10 and/or qemu-2.10 because the state of unplug is not propagated from one dom0 to another. Without this unplug qemu's block-backend will be unable to open qcow2 disks on the receiving dom0

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 Server 11-SP3-LTSS:zypper in -t patch slessp3-xen-13752=1

SUSE Linux Enterprise Point of Sale 11-SP3:zypper in -t patch sleposp3-xen-13752=1

SUSE Linux Enterprise Debuginfo 11-SP3:zypper in -t patch dbgsp3-xen-13752=1

See Also

https://bugzilla.suse.com/1027519

https://bugzilla.suse.com/1074562

https://bugzilla.suse.com/1079730

https://bugzilla.suse.com/1090822

https://bugzilla.suse.com/1090823

https://bugzilla.suse.com/1091107

https://bugzilla.suse.com/1092631

https://bugzilla.suse.com/1095242

https://bugzilla.suse.com/1096224

https://bugzilla.suse.com/1097206

https://bugzilla.suse.com/1097521

https://bugzilla.suse.com/1097522

https://bugzilla.suse.com/1098744

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

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

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

https://www.suse.com/security/cve/CVE-2018-10981.html

https://www.suse.com/security/cve/CVE-2018-10982.html

https://www.suse.com/security/cve/CVE-2018-11806.html

https://www.suse.com/security/cve/CVE-2018-12617.html

https://www.suse.com/security/cve/CVE-2018-12891.html

https://www.suse.com/security/cve/CVE-2018-12893.html

https://www.suse.com/security/cve/CVE-2018-3639.html

https://www.suse.com/security/cve/CVE-2018-3646.html

https://www.suse.com/security/cve/CVE-2018-3665.html

http://www.nessus.org/u?40997dc4

Plugin Details

Severity: High

ID: 112147

File Name: suse_SU-2018-2528-1.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2018/08/28

Modified: 2018/08/31

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.2

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

CVSS v3.0

Base Score: 8.8

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:xen, p-cpe:/a:novell:suse_linux:xen-doc-html, p-cpe:/a:novell:suse_linux:xen-doc-pdf, p-cpe:/a:novell:suse_linux:xen-kmp-default, p-cpe:/a:novell:suse_linux:xen-kmp-pae, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-domU, cpe:/o:novell:suse_linux:11

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: 2018/08/27

Exploitable With

CANVAS (CANVAS)

Reference Information

CVE: CVE-2017-5715, CVE-2017-5753, CVE-2017-5754, CVE-2018-10981, CVE-2018-10982, CVE-2018-11806, CVE-2018-12617, CVE-2018-12891, CVE-2018-12893, CVE-2018-3639, CVE-2018-3646, CVE-2018-3665