Synopsis

Important: qemu-kvm-rhev security and bug fix update

Type/Severity

Security Advisory: Important

Topic

An update for qemu-kvm-rhev is now available for RHEV 3.X Hypervisor and Agents for RHEL-7 and RHEV 4.X RHEV-H and Agents for RHEL-7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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

Security Fix(es):

• Quick Emulator (QEMU) built with Network Block Device (NBD) Server support was vulnerable to a null-pointer dereference issue. The flaw could occur when releasing a client, which was not initialized due to failed negotiation. A remote user or process could exploit this flaw to crash the qemu-nbd server (denial of service). (CVE-2017-9524)
  

Bug Fix(es):

• Previously, when the data plane was in use, changing the target image of a virtual SCSI CD device caused the guest to terminate unexpectedly with a core dump. With this update, the virtio-scsi bus rejects SCSI CDs when the data plane is active, which prevents the crash from occurring. Note that this is a temporary solution, and a full fix to make the data plane and SCSI CD compatible will be provided in the future. (BZ#1461837)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

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.

Affected Products

• Red Hat Virtualization 4 x86_64
• Red Hat Virtualization 3 for RHEL 7 x86_64
• Red Hat Virtualization for IBM Power LE 4 ppc64le
• Red Hat Virtualization for IBM Power LE 3 ppc64le

Fixes

• BZ - 1460170 - CVE-2017-9524 Qemu: nbd: segmentation fault due to client non-negotiation
• BZ - 1461837 - Core dump when use "data-plane" and execute change cd

CVEs

• CVE-2017-9524

References

• https://access.redhat.com/security/updates/classification/#important

Red Hat Virtualization 4

SRPM
qemu-kvm-rhev-2.6.0-28.el7_3.12.src.rpm	SHA-256: 97e1480fe6868347354edc6160b804d7cc842c363d4fd4a7746a229d1283b198
x86_64
qemu-img-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: 465c173378c14e81048624f039702159c32ac0ee6323fe00c43d1cd271ec86f9
qemu-kvm-common-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: f2fc578920b3c61fbbaf367d477f8099b82b1c348d406fe1be399ccacdbda5c1
qemu-kvm-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: 4cff9df313bd1c3aa9623fac1665cd4393c4903a9ed3f21930f8d637bfea1702
qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: d1c1b76d96d59c3ec5aab342e10a99a056baff3beb9824ee2360b8d14f4d2bbe
qemu-kvm-tools-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: 115b5f0f8cdc5f5739625608220402da070db3acf4ebc739b9e5a47e9523c421

Red Hat Virtualization 3 for RHEL 7

SRPM
qemu-kvm-rhev-2.6.0-28.el7_3.12.src.rpm	SHA-256: 97e1480fe6868347354edc6160b804d7cc842c363d4fd4a7746a229d1283b198
x86_64
qemu-img-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: 465c173378c14e81048624f039702159c32ac0ee6323fe00c43d1cd271ec86f9
qemu-kvm-common-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: f2fc578920b3c61fbbaf367d477f8099b82b1c348d406fe1be399ccacdbda5c1
qemu-kvm-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: 4cff9df313bd1c3aa9623fac1665cd4393c4903a9ed3f21930f8d637bfea1702
qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: d1c1b76d96d59c3ec5aab342e10a99a056baff3beb9824ee2360b8d14f4d2bbe
qemu-kvm-tools-rhev-2.6.0-28.el7_3.12.x86_64.rpm	SHA-256: 115b5f0f8cdc5f5739625608220402da070db3acf4ebc739b9e5a47e9523c421

Red Hat Virtualization for IBM Power LE 4

SRPM
qemu-kvm-rhev-2.6.0-28.el7_3.12.src.rpm	SHA-256: 97e1480fe6868347354edc6160b804d7cc842c363d4fd4a7746a229d1283b198
ppc64le
qemu-img-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 5fbfaac577e4a7196bb0604796686a0a089e282cec9ae3e56252505c0bdc97dd
qemu-kvm-common-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: cfcfcfe7e5206d0f71b3b73cf026b7cabbd92047711afcc7a4e089fdb1f0a983
qemu-kvm-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 5469ef9cb955f5f1ca59fa44d5e632d1c5c75e0ea9f4084f6b0b2a31527ea2b0
qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 86f4c75e172e179bf94618ab12918efe5a6b9dabecbf48642d3d528af4057a3c
qemu-kvm-tools-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 1caaeeb5cf27f2f07a690b77995f94e3a6e7d8897cc696e24e7a42bde8305fc6

Red Hat Virtualization for IBM Power LE 3

SRPM
qemu-kvm-rhev-2.6.0-28.el7_3.12.src.rpm	SHA-256: 97e1480fe6868347354edc6160b804d7cc842c363d4fd4a7746a229d1283b198
ppc64le
qemu-img-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 5fbfaac577e4a7196bb0604796686a0a089e282cec9ae3e56252505c0bdc97dd
qemu-kvm-common-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: cfcfcfe7e5206d0f71b3b73cf026b7cabbd92047711afcc7a4e089fdb1f0a983
qemu-kvm-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 5469ef9cb955f5f1ca59fa44d5e632d1c5c75e0ea9f4084f6b0b2a31527ea2b0
qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 86f4c75e172e179bf94618ab12918efe5a6b9dabecbf48642d3d528af4057a3c
qemu-kvm-tools-rhev-2.6.0-28.el7_3.12.ppc64le.rpm	SHA-256: 1caaeeb5cf27f2f07a690b77995f94e3a6e7d8897cc696e24e7a42bde8305fc6