7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM in environments managed by Red Hat Enterprise Virtualization Manager. Multiple integer overflow, input validation, logic error, and buffer overflow flaws were discovered in various QEMU block drivers. An attacker able to modify a disk image file loaded by a guest could use these flaws to crash the guest, or corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2014-0143, CVE-2014-0144, CVE-2014-0145, CVE-2014-0147) A buffer overflow flaw was found in the way the virtio_net_handle_mac() function of QEMU processed guest requests to update the table of MAC addresses. A privileged guest user could use this flaw to corrupt QEMU process memory on the host, potentially resulting in arbitrary code execution on the host with the privileges of the QEMU process. (CVE-2014-0150) A divide-by-zero flaw was found in the seek_to_sector() function of the parallels block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest. (CVE-2014-0142) A NULL pointer dereference flaw was found in the QCOW2 block driver in QEMU. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest. (CVE-2014-0146) It was found that the block driver for Hyper-V VHDX images did not correctly calculate BAT (Block Allocation Table) entries due to a missing bounds check. An attacker able to modify a disk image file loaded by a guest could use this flaw to crash the guest. (CVE-2014-0148) The CVE-2014-0143 issues were discovered by Kevin Wolf and Stefan Hajnoczi of Red Hat, the CVE-2014-0144 issues were discovered by Fam Zheng, Jeff Cody, Kevin Wolf, and Stefan Hajnoczi of Red Hat, the CVE-2014-0145 issues were discovered by Stefan Hajnoczi of Red Hat, the CVE-2014-0150 issue was discovered by Michael S. Tsirkin of Red Hat, the CVE-2014-0142, CVE-2014-0146, and CVE-2014-0147 issues were discovered by Kevin Wolf of Red Hat, and the CVE-2014-0148 issue was discovered by Jeff Cody of Red Hat. All users of qemu-kvm-rhev are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 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.
git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=509a41bab5306181044b5fff02eadf96d9c8676a
git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=6a83f8b5bec6f59e56cc49bd49e4c3f8f805d56f
git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=8f4754ede56e3f9ea3fd7207f4a7c4453e59285b
git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=afbcc40bee4ef51731102d7d4b499ee12fc182e1
git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=cab60de930684c33f67d4e32c7509b567f8c445b
git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=db8a31d11d6a60f48d6817530640d75aa72a9a2f
git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=e3737b820b45e54b059656dc3f914f895ac7a88b
git.qemu.org/?p=qemu.git;a=commit;h=509a41bab5306181044b5fff02eadf96d9c8676a
git.qemu.org/?p=qemu.git;a=commit;h=6a83f8b5bec6f59e56cc49bd49e4c3f8f805d56f
git.qemu.org/?p=qemu.git;a=commit;h=8f4754ede56e3f9ea3fd7207f4a7c4453e59285b
git.qemu.org/?p=qemu.git;a=commit;h=afbcc40bee4ef51731102d7d4b499ee12fc182e1
git.qemu.org/?p=qemu.git;a=commit;h=cab60de930684c33f67d4e32c7509b567f8c445b
git.qemu.org/?p=qemu.git;a=commit;h=db8a31d11d6a60f48d6817530640d75aa72a9a2f
git.qemu.org/?p=qemu.git;a=commit;h=e3737b820b45e54b059656dc3f914f895ac7a88b
rhn.redhat.com/errata/RHSA-2014-0420.html
rhn.redhat.com/errata/RHSA-2014-0421.html
www.debian.org/security/2014/dsa-3044
access.redhat.com/errata/RHSA-2014:0420
access.redhat.com/errata/RHSA-2014:0421
access.redhat.com/errata/RHSA-2014:0434
access.redhat.com/errata/RHSA-2014:0435
access.redhat.com/errata/RHSA-2014:0674
access.redhat.com/security/cve/CVE-2014-0143
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=1079140
rhn.redhat.com/errata/RHSA-2014-0421.html
7 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.4 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:M/Au:N/C:P/I:P/A:P