AXSA:2019-3877:02

Release date: 
Tuesday, May 14, 2019 - 19:56
Subject: 
qemu-kvm-1.5.3-160.el7.2
Affected Channels: 
Asianux Server 7 for x86_64
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-1.5.3-160.el7.2.src.rpm
md5sum: 95d59a208abb0aca71dfd85fa0077e30
sha256sum: c5701a6681bc59ef26d152f7b9cf5aa7d050f537a8a5dc32d65235ba47bf6367
Size: 15,234 Kb

Asianux Server 7.0 for x86_64
1. qemu-img-1.5.3-160.el7.2.x86_64.rpm
md5sum: b95d219e3b58c88d80dcd182aae4a49f
sha256sum: fdadfcddb89c6ae3b20a9ba08fe9c6a19e7f864f66b3413033d4baa82df1a160
Size: 694 Kb
2. qemu-kvm-1.5.3-160.el7.2.x86_64.rpm
md5sum: c92bdd8e0e14c2956620ae677b87a2af
sha256sum: 218be047acdfd54a3d8882013788196e5a95cac26cfde94bd29c2ed983bc683c
Size: 1,966 Kb
3. qemu-kvm-common-1.5.3-160.el7.2.x86_64.rpm
md5sum: cd8f32118c82c73c303949e00057007c
sha256sum: 44d4112ae78ba1ac1e9e9ea5a55555fb1a6bc6e5936c7d94d38f3878f27e51d6
Size: 431 Kb
4. qemu-kvm-tools-1.5.3-160.el7.2.x86_64.rpm
md5sum: 3e4703a92adbee2f79c2365c6a31f581
sha256sum: 794dac1eebd9903bdfac694e8df7e1b92177dd131ef238045ae9c6cbf7693ce7
Size: 229 Kb
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