【CESA-2017:0454】最新バージョンのkvmが、Red Hat Enterprise Linux 5 からご利用いただけるようになりました

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CESA-2017:0454

最新バージョンのkvmが、Red Hat Enterprise Linux 5 からご利用いただけるようになりました。

Red Hat製品のセキュリティ及び品質は大変ご好評いただいております。

今回の最新バージョンVulnerability Scoring System(CVSS)は、各セキュリティホールへのアクセス安全面を厳重にクラス分けし、確実・安全に詳細レポートをお送りいたします。参照セクションのリンクをクリックしてください。

KVM (for Kernel-based Virtual Machine) is a full virtualization solution for
Linux on x86 hardware. Using KVM, one can run multiple virtual machines running
unmodified Linux or Windows images. Each virtual machine has private virtualized
hardware: a network card, disk, graphics adapter, etc.

Security Fix(es):

* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is
vulnerable to an out-of-bounds access issue. It could occur while copying VGA
data via bitblt copy in backward mode. A privileged user inside a guest could
use this flaw to crash the QEMU process resulting in DoS or potentially execute
arbitrary code on the host with privileges of QEMU process on the host.
(CVE-2017-2615)

* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator support is
vulnerable to an out-of-bounds access issue. The issue could occur while copying
VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use
this flaw to crash the QEMU process OR potentially execute arbitrary code on
host with privileges of the QEMU process. (CVE-2017-2620)

Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn
Inc.) for reporting CVE-2017-2615.

Bugs Fixed

1418200 – CVE-2017-2615 Qemu: display: cirrus: oob access while doing bitblt copy backward mode
1420484 – CVE-2017-2620 Qemu: display: cirrus: potential arbitrary code execution via cirrus_bitblt_cputovideo