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SUSE SLED12 / SLES12 Security Update : xen (SUSE-SU-2017:2751-1)

medium Nessus Plugin ID 103919

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Synopsis

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

Description

This update for xen fixes several issues: These security issues were fixed :

 - CVE-2017-5526: The ES1370 audio device emulation support was vulnerable to a memory leakage issue allowing a privileged user inside the guest to cause a DoS and/or potentially crash the Qemu process on the host (bsc#1059777)

 - bsc#1061084: Missing cleanup in the page type system allowed a malicious or buggy PV guest to cause DoS (XSA-242)

 - bsc#1061086: A problem in the shadow pagetable code allowed a malicious or buggy HVM guest to cause DoS or cause hypervisor memory corruption potentially allowing the guest to escalate its privilege (XSA-243)

 - bsc#1061087: Problematic handling of the selector fields in the Interrupt Descriptor Table (IDT) allowed a malicious or buggy x86 PV guest to escalate its privileges or cause DoS (XSA-244)

 - bsc#1061077 Missing checks in the handling of DMOPs allowed malicious or buggy stub domain kernels or tool stacks otherwise living outside of Domain0 to cause a DoS (XSA-238)

 - bsc#1061080: Intercepted I/O write operations with less than a full machine word's worth of data were not properly handled, which allowed a malicious unprivileged x86 HVM guest to obtain sensitive information from the host or other guests (XSA-239)

 - bsc#1061081: In certain configurations of linear page tables a stack overflow might have occured that allowed a malicious or buggy PV guest to cause DoS and potentially privilege escalation and information leaks (XSA-240)

 - bsc#1061082: Under certain conditions x86 PV guests could have caused the hypervisor to miss a necessary TLB flush for a page. This allowed a malicious x86 PV guest to access all of system memory, allowing for privilege escalation, DoS, and information leaks (XSA-241)

 - bsc#1061076: Multiple issues existed with the setup of PCI MSI interrupts that allowed a malicious or buggy guest to cause DoS and potentially privilege escalation and information leaks (XSA-237)

 - bsc#1055321: When dealing with the grant map space of add-to-physmap operations, ARM specific code failed to release a lock. This allowed a malicious guest administrator to cause DoS (XSA-235)

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 Linux Enterprise Software Development Kit 12-SP3:zypper in -t patch SUSE-SLE-SDK-12-SP3-2017-1702=1

SUSE Linux Enterprise Server 12-SP3:zypper in -t patch SUSE-SLE-SERVER-12-SP3-2017-1702=1

SUSE Linux Enterprise Desktop 12-SP3:zypper in -t patch SUSE-SLE-DESKTOP-12-SP3-2017-1702=1

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

See Also

https://bugzilla.suse.com/show_bug.cgi?id=1027519

https://bugzilla.suse.com/show_bug.cgi?id=1055321

https://bugzilla.suse.com/show_bug.cgi?id=1059777

https://bugzilla.suse.com/show_bug.cgi?id=1061076

https://bugzilla.suse.com/show_bug.cgi?id=1061077

https://bugzilla.suse.com/show_bug.cgi?id=1061080

https://bugzilla.suse.com/show_bug.cgi?id=1061081

https://bugzilla.suse.com/show_bug.cgi?id=1061082

https://bugzilla.suse.com/show_bug.cgi?id=1061084

https://bugzilla.suse.com/show_bug.cgi?id=1061086

https://bugzilla.suse.com/show_bug.cgi?id=1061087

https://www.suse.com/security/cve/CVE-2017-5526/

http://www.nessus.org/u?4c15cda1

Plugin Details

Severity: Medium

ID: 103919

File Name: suse_SU-2017-2751-1.nasl

Version: 3.6

Type: local

Agent: unix

Published: 10/18/2017

Updated: 1/6/2021

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

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

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:xen, p-cpe:/a:novell:suse_linux:xen-debugsource, p-cpe:/a:novell:suse_linux:xen-doc-html, p-cpe:/a:novell:suse_linux:xen-libs, p-cpe:/a:novell:suse_linux:xen-libs-debuginfo, p-cpe:/a:novell:suse_linux:xen-tools, p-cpe:/a:novell:suse_linux:xen-tools-debuginfo, p-cpe:/a:novell:suse_linux:xen-tools-domu, p-cpe:/a:novell:suse_linux:xen-tools-domu-debuginfo, cpe:/o:novell:suse_linux:12

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/17/2017

Vulnerability Publication Date: 3/15/2017

Reference Information

CVE: CVE-2017-5526