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Test ID:1.3.6.1.4.1.25623.1.1.4.2019.0875.1
Category:SuSE Local Security Checks
Title:SUSE: Security Advisory (SUSE-SU-2019:0875-1)
Summary:The remote host is missing an update for the 'Recommended update for xen' package(s) announced via the SUSE-SU-2019:0875-1 advisory.
Description:Summary:
The remote host is missing an update for the 'Recommended update for xen' package(s) announced via the SUSE-SU-2019:0875-1 advisory.

Vulnerability Insight:
This update for xen fixes the following issues:

Security issues fixed:
CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the
host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)

Fixed an issue which could allow malicious PV guests may cause a host
crash or gain access to data pertaining to other guests.Additionally,
vulnerable configurations are likely to be unstable even in the absence
of an attack (bsc#1126198).

Fixed multiple access violations introduced by XENMEM_exchange hypercall
which could allow a single PV guest to leak arbitrary amounts of memory,
leading to a denial of service (bsc#1126192).

Fixed an issue which could allow a malicious unprivileged guest
userspace process to escalate its privilege to that of other userspace
processes in the same guest and potentially thereby to that
of the guest operating system (bsc#1126201).

Fixed an issue which could allow malicious or buggy x86 PV guest kernels
to mount a Denial of Service attack affecting the whole system
(bsc#1126197).

Fixed an issue which could allow an untrusted PV domain with access to a
physical device to DMA into its own pagetables leading to privilege
escalation (bsc#1126195).

Fixed an issue which could allow a malicious or buggy x86 PV guest
kernels can mount a Denial of Service attack affecting the whole system
(bsc#1126196).

Fixed an issue which could allow malicious 64bit PV guests to cause a
host crash (bsc#1127400).

Fixed an issue which could allow malicious or buggy guests with passed
through PCI devices to be able to escalate their privileges, crash the
host, or access data belonging to other guests. Additionally memory
leaks were also possible (bsc#1126140).

Fixed a race condition issue which could allow malicious PV guests to
escalate their privilege to that
of the hypervisor (bsc#1126141).

Other issues fixed:
Upstream bug fixes (bsc#1027519)

Fixed an issue where setup of grant_tables and other variables may fail
(bsc#1126325).

Added a requirement for xen, xl.cfg firmware='pvgrub32pvgrub64
(bsc#1127620).

Added Xen cmdline option 'suse_vtsc_tolerance' to avoid TSC emulation
for HVM domUs (bsc#1026236).

Affected Software/OS:
'Recommended update for xen' package(s) on SUSE Linux Enterprise Module for Server Applications 15, SUSE Linux Enterprise Module for Basesystem 15

Solution:
Please install the updated package(s).

CVSS Score:
4.9

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2018-19967
CopyrightCopyright (C) 2021 Greenbone Networks GmbH

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