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Red Hat Enterprise Linux 7 RHSA-2015:1793-01 Moderate: QEMU-KVM Info Leak

red hat
Calendar Grey September 15, 2015
Dist Redhat Esm H88
A significant qemu-kvm security patch for Red Hat Enterprise Linux 7 addresses a vulnerability related to information disclosure. Update immediately.
Updated qemu-kvm packages that fix one security issue are now available for Red Hat Enterprise Linux 7

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Summary

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the user-space component for running virtual machines using KVM.
An information leak flaw was found in the way QEMU's RTL8139 emulation implementation processed network packets under RTL8139 controller's C+ mode of operation. An unprivileged guest user could use this flaw to read up to 65 KB of uninitialized QEMU heap memory. (CVE-2015-5165)
Red Hat would like to thank the Xen project for reporting this issue. Upstream acknowledges Donghai Zhu of Alibaba as the original reporter.
All qemu-kvm users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect.

Topics%20covered

Topics Covered

security advisory Red Hat security fix moderate impact info leak qemu-kvm

References

https://access.redhat.com/security/cve/CVE-2015-5165 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: qemu-kvm-1.5.3-86.el7_1.6.src.rpm
x86_64: libcacard-1.5.3-86.el7_1.6.i686.rpm libcacard-1.5.3-86.el7_1.6.x86_64.rpm qemu-img-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-common-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.6.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-tools-1.5.3-86.el7_1.6.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: libcacard-devel-1.5.3-86.el7_1.6.i686.rpm libcacard-devel-1.5.3-86.el7_1.6.x86_64.rpm libcacard-tools-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.6.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.6.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
Source: qemu-kvm-1.5.3-86.el7_1.6.src.rpm
x86_64: libcacard-1.5.3-86.el7_1.6.i686.rpm libcacard-1.5.3-86.el7_1.6.x86_64.rpm libcacard-devel-1.5.3-86.el7_1.6.i686.rpm libcacard-devel-1.5.3-86.el7_1.6.x86_64.rpm libcacard-tools-1.5.3-86.el7_1.6.x86_64.rpm qemu-img-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-common-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.6.i686.rpm qemu-kvm-debuginfo-1.5.3-86.el7_1.6.x86_64.rpm qemu-kvm-tools-1.5.3-86.el7_1.6.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):


Read the Full Advisory


Advisory ID: RHSA-2015:1793-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1793.html
Issue date: 2015-09-15

Topic

Updated qemu-kvm packages that fix one security issue are now available forRed Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Moderate securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory Red Hat security fix moderate impact info leak qemu-kvm

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1248760 - CVE-2015-5165 Qemu: rtl8139 uninitialized heap memory information leakage to guest (XSA-140)

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