SuSE 11.3 Security Update : Xen (SAT Patch Number 10560)

high Nessus Plugin ID 82990

Synopsis

The remote SuSE 11 host is missing one or more security updates.

Description

The Virtualization service XEN was updated to fix various bugs and security issues.

The following security issues have been fixed :

- XSA-126: Unmediated PCI command register access in qemu could have lead to denial of service attacks against the host, if PCI cards are passed through to guests.
(CVE-2015-2756)

- XSA-125: Long latency MMIO mapping operations were not preemptible.

- XSA-123: Instructions with register operands ignored eventual segment overrides encoded for them. Due to an insufficiently conditional assignment such a bogus segment override could have, however, corrupted a pointer used subsequently to store the result of the instruction. (CVE-2015-2151)

- XSA-122: The code handling certain sub-operations of the HYPERVISOR_xen_version hypercall failed to fully initialize all fields of structures subsequently copied back to guest memory. Due to this hypervisor stack contents were copied into the destination of the operation, thus becoming visible to the guest.
(CVE-2015-2045)

- XSA-121: Emulation routines in the hypervisor dealing with certain system devices checked whether the access size by the guest is a supported one. When the access size is unsupported these routines failed to set the data to be returned to the guest for read accesses, so that hypervisor stack contents were copied into the destination of the operation, thus becoming visible to the guest. (CVE-2015-2044)

Also fixed :

- Fully virtualized guest install from network source failed with 'cannot find guest domain' in XEN.
(bsc#919341)

Solution

Apply SAT patch number 10560.

See Also

https://bugzilla.novell.com/show_bug.cgi?id=918995

https://bugzilla.novell.com/show_bug.cgi?id=918998

https://bugzilla.novell.com/show_bug.cgi?id=919341

https://bugzilla.novell.com/show_bug.cgi?id=919464

https://bugzilla.novell.com/show_bug.cgi?id=922705

https://bugzilla.novell.com/show_bug.cgi?id=922706

http://support.novell.com/security/cve/CVE-2015-2044.html

http://support.novell.com/security/cve/CVE-2015-2045.html

http://support.novell.com/security/cve/CVE-2015-2151.html

http://support.novell.com/security/cve/CVE-2015-2756.html

Plugin Details

Severity: High

ID: 82990

File Name: suse_11_xen-201503-150330.nasl

Version: 1.2

Type: local

Agent: unix

Published: 4/22/2015

Updated: 1/6/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 6

CVSS v2

Risk Factor: High

Base Score: 7.2

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:11:xen, p-cpe:/a:novell:suse_linux:11:xen-doc-html, p-cpe:/a:novell:suse_linux:11:xen-doc-pdf, p-cpe:/a:novell:suse_linux:11:xen-kmp-default, p-cpe:/a:novell:suse_linux:11:xen-kmp-pae, p-cpe:/a:novell:suse_linux:11:xen-libs, p-cpe:/a:novell:suse_linux:11:xen-libs-32bit, p-cpe:/a:novell:suse_linux:11:xen-tools, p-cpe:/a:novell:suse_linux:11: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

Patch Publication Date: 3/30/2015

Reference Information

CVE: CVE-2015-2044, CVE-2015-2045, CVE-2015-2151, CVE-2015-2756