AXSA:2019-3878:01

Release date: 
Tuesday, May 14, 2019 - 19:57
Subject: 
qemu-kvm-0.12.1.2-2.506.AXS4.3
Affected Channels: 
Asianux Server 4 for x86_64
Asianux Server 4 for x86
Severity: 
High
Description: 

Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.

Security Fix(es):

* A flaw was found in the implementation of the "fill buffer", a mechanism used by modern CPUs when a cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page fault, the execution will continue speculatively with incorrect data from the fill buffer while the data is fetched from higher level caches. This response time can be measured to infer data in the fill buffer. (CVE-2018-12130)

* Modern Intel microprocessors implement hardware-level micro-optimizations to improve the performance of writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore Data) sub-operations. These sub-operations allow the processor to hand-off address generation logic into these sub-operations for optimized writes. Both of these sub-operations write to a shared distributed processor structure called the 'processor store buffer'. As a result, an unprivileged attacker could use this flaw to read private data resident within the CPU's processor store buffer. (CVE-2018-12126)

* Microprocessors use a ‘load port’ subcomponent to perform load operations from memory or IO. During a load operation, the load port receives data from the memory or IO subsystem and then provides the data to the CPU registers and operations in the CPU’s pipelines. Stale load operations results are stored in the 'load port' table until overwritten by newer operations. Certain load-port operations triggered by an attacker can be used to reveal data about previous stale requests leaking data back to the attacker via a timing side-channel. (CVE-2018-12127)

* Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. (CVE-2019-11091)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

CVE-2018-12126
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.
CVE-2018-12127
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.
CVE-2018-12130
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.
CVE-2019-11091
** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Solution: 

Update packages.

Additional Info: 

N/A

Download: 

SRPMS
  1. qemu-kvm-0.12.1.2-2.506.AXS4.3.src.rpm
    MD5: 5d5e383bafbe6734117ec42ad4469c35
    SHA-256: 36bd7f3efdc2f1b20f6a5d1c2c7ea5417ac730dd92971052c8f3aa5ead7dce01
    Size: 10.90 MB

Asianux Server 4 for x86
  1. qemu-guest-agent-0.12.1.2-2.506.AXS4.3.i686.rpm
    MD5: 46c202335369c25b1601cd37c6fefccb
    SHA-256: b0a3b433b3f28f83f882ded4ad448f1055a9fbcbbeaf583b319aa55c129a3d17
    Size: 511.31 kB

Asianux Server 4 for x86_64
  1. qemu-guest-agent-0.12.1.2-2.506.AXS4.3.x86_64.rpm
    MD5: 707501a6ed56348840355976c20168d0
    SHA-256: cc92aa5252ad07cd2e3b919a7b3fd55563c42079b8612a5239a7923ea8dbf920
    Size: 508.37 kB
  2. qemu-img-0.12.1.2-2.506.AXS4.3.x86_64.rpm
    MD5: 8f677ce835e578bdae63e9d404d9b41b
    SHA-256: 43bdda4109d7bfd2aeedd8ea849bb551b31a5dce59c91f7342ae785dd94140cc
    Size: 846.75 kB
  3. qemu-kvm-0.12.1.2-2.506.AXS4.3.x86_64.rpm
    MD5: 6cf9becde5f79314818dd550f28d505c
    SHA-256: 6e5b500c344d3a345397eb7c63eb86bb1f7469296165d9eee7277011d5e7b7ee
    Size: 1.62 MB
  4. qemu-kvm-tools-0.12.1.2-2.506.AXS4.3.x86_64.rpm
    MD5: 0c937a6e2eeede39a5e4bef45de2bc37
    SHA-256: 971e03799dba3a652ffcc2a30ce2bd356d0ba6e164b79b1710e9518ebf9f6cbd
    Size: 434.02 kB
Copyright© 2007-2015 Asianux. All rights reserved.