Scientific Linux Security Update : qemu-kvm on SL6.x i386/x86_64
Medium Nessus Plugin ID 87639
SynopsisThe remote Scientific Linux host is missing one or more security updates.
DescriptionA 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.
SolutionUpdate the affected packages.