Qemu block drivers for CLOOP, QCOW2 version 2 and various other image formats use by Bochs are vulnerable to an integer overflow flaw. It occurs due to weak input validations or logic errors. Such integer overflow could lead to buffer overflows, memory corruption or crash in Qemu instance. An user able to alter the Qemu disk image files loaded by a guest could use this flaw to crash the Qemu instance resulting in DoS or corrupt QEMU process memory on the host, which could potentially result in arbitrary code execution on the host with the privileges of the QEMU process. Upstream fixes: --------------- parallels: Fix catalog size integer overflow -> http://git.qemu.org/?p=qemu.git;a=commit;h=afbcc40bee4ef51731102d7d4b499ee12fc182e1 qcow2: Check maximum L1 size in qcow2_snapshot_load_tmp -> http://git.qemu.org/?p=qemu.git;a=commit;h=6a83f8b5bec6f59e56cc49bd49e4c3f8f805d56f block: Limit request size -> http://git.qemu.org/?p=qemu.git;a=commit;h=8f4754ede56e3f9ea3fd7207f4a7c4453e59285b qcow2: Fix new L1 table size check -> http://git.qemu.org/?p=qemu.git;a=commit;h=cab60de930684c33f67d4e32c7509b567f8c445b qcow2: Avoid integer overflow in get_refcount -> http://git.qemu.org/?p=qemu.git;a=commit;h=db8a31d11d6a60f48d6817530640d75aa72a9a2f bochs: Check catalog_size header field -> http://git.qemu.org/?p=qemu.git;a=commit;h=e3737b820b45e54b059656dc3f914f895ac7a88b block/cloop: prevent offsets_size integer overflow -> http://git.qemu.org/?p=qemu.git;a=commit;h=509a41bab5306181044b5fff02eadf96d9c8676a
Statement: This issue affects the versions of kvm package as shipped with Red Hat Enterprise Linux 5. This issue affects the versions of qemu-kvm package as shipped with Red Hat Enterprise Linux 6.
Acknowledgement: These issues were discovered by Kevin Wolf and Stefan Hajnoczi of Red Hat Inc.
Created qemu tracking bugs for this issue: Affects: fedora-all [bug 1086724]
This issue has been addressed in following products: RHEV-H and Agents for RHEL-6 Via RHSA-2014:0421 https://rhn.redhat.com/errata/RHSA-2014-0421.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2014:0420 https://rhn.redhat.com/errata/RHSA-2014-0420.html
This issue has been addressed in following products: OpenStack 3 for RHEL 6 Via RHSA-2014:0435 https://rhn.redhat.com/errata/RHSA-2014-0435.html
This issue has been addressed in following products: OpenStack 4 for RHEL 6 Via RHSA-2014:0434 https://rhn.redhat.com/errata/RHSA-2014-0434.html
qemu-1.6.2-4.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products: RHEV-H and Agents for RHEL-6 Via RHSA-2014:0674 https://rhn.redhat.com/errata/RHSA-2014-0674.html