Synopsis:          Important: qemu-kvm security update

Advisory ID:       SLSA-2015:2694-1

Issue Date:        2015-12-22

CVE Numbers:       CVE-2015-7504

                   CVE-2015-7512

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A heap-based buffer overflow flaw was discovered in the way QEMU's AMD PC-

Net II Ethernet Controller emulation received certain packets in loopback

mode. A privileged user (with the CAP_SYS_RAWIO capability) inside a guest

could use this flaw to crash the host QEMU process (resulting in denial of

service) or, potentially, execute arbitrary code with privileges of the

host QEMU process. (CVE-2015-7504)



A buffer overflow flaw was found in the way QEMU's AMD PC-Net II emulation

validated certain received packets from a remote host in non-loopback

mode. A remote, unprivileged attacker could potentially use this flaw to

execute arbitrary code on the host with the privileges of the QEMU

process. Note that to exploit this flaw, the guest network interface must

have a large MTU limit. (CVE-2015-7512)



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.

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SL6

  x86_64

    qemu-guest-agent-0.12.1.2-2.479.el6_7.3.x86_64.rpm

    qemu-img-0.12.1.2-2.479.el6_7.3.x86_64.rpm

    qemu-kvm-0.12.1.2-2.479.el6_7.3.x86_64.rpm

    qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.3.x86_64.rpm

    qemu-kvm-tools-0.12.1.2-2.479.el6_7.3.x86_64.rpm

  i386

    qemu-guest-agent-0.12.1.2-2.479.el6_7.3.i686.rpm

    qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.3.i686.rpm



- Scientific Linux Development Team