Updated qemu-kvm-rhev packages that fix one security issue are nowavailable for Red Hat Enterprise Virtualization Hypervisor 7.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.
KVM (Kernel-based Virtual Machine) is a full virtualization solution forLinux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides theuser-space component for running virtual machines using KVM.An out-of-bounds memory access flaw was found in the way QEMU’s virtualFloppy Disk Controller (FDC) handled FIFO buffer access while processingcertain FDC commands. A privileged guest user could use this flaw to crashthe guest or, potentially, execute arbitrary code on the host with theprivileges of the host’s QEMU process corresponding to the guest.(CVE-2015-3456)Red Hat would like to thank Jason Geffner of CrowdStrike for reportingthis issue.All qemu-kvm-rhev users are advised to upgrade to these updated packages,which contain a backported patch to correct this issue. After installingthis update, shut down all running virtual machines. Once all virtualmachines have shut down, start them again for this update to take effect.
Before applying this update, make sure all previously released erratarelevant to your system have been applied.For details on how to apply this update, refer to:https://access.redhat.com/articles/11258Red Hat Enterprise Virtualization 3
MD5: 21739011a1cb5a548a6670db92bdb157SHA-256: 56f87e6187e376b5ab80ef19bc10db5568d7752e9c0802daae74ce94700dfbd6
MD5: d66d9d72c482d248b62bc9120a810607SHA-256: 1800ce19a9c75922cdb5b10f6f6851150b8584ab7b8c3cbac28edb11e35c98c9
MD5: 3309326317645f273db3eacef9903eddSHA-256: 3fa45f97a91d4f5e28cd73791a5595b292b7c0bf5df3d9be283c5e4aca894f89
MD5: e094c5c7296484390223d9890a17656dSHA-256: 3a3871b2b0f431cd92fac74374f6ac725f31d836c521631f2d0c1e716720ac09
MD5: 2c7c42fd67153cce132f787bb51dfa55SHA-256: 2ed7417f544b73f208d177cb9b6e9c77e40e51302801a33c3d0b9c4a69898b0f
MD5: 3519b0dd4bb8568320a2ee4ba0881356SHA-256: 30fdc3698760de39a707a8af79c884eb202d95414164ad0bb6ab8e7863b75c99
MD5: 9900a9004b00911a3e025904cc4cbd32SHA-256: 5d4d4d7e9005e0b910e2c10755298ab4abb6b74d74dad893c8761487e6e2e3be
MD5: a5767e159b488a26044f936c0c47aabeSHA-256: e21318ee8235faa504945fa179ca8c2346aed05a4d8e1a936e4e0842102b8a7d
(The unlinked packages above are only available from the Red Hat Network)
1218611 – CVE-2015-3456 qemu: fdc: out-of-bounds fifo buffer memory access
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