rhsa-2014_0743
Vulnerability from csaf_redhat
Published
2014-06-10 20:14
Modified
2024-11-22 08:09
Summary
Red Hat Security Advisory: qemu-kvm security and bug fix update
Notes
Topic
Updated qemu-kvm packages that fix multiple security issues and two bugs
are now available for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
Details
KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the
user-space component for running virtual machines using KVM.
Multiple buffer overflow, input validation, and out-of-bounds write flaws
were found in the way the virtio, virtio-net, virtio-scsi, and usb drivers
of QEMU handled state loading after migration. A user able to alter the
savevm data (either on the disk or over the wire during migration) could
use either of these flaws to corrupt QEMU process memory on the
(destination) host, which could potentially result in arbitrary code
execution on the host with the privileges of the QEMU process.
(CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541,
CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)
An out-of-bounds memory access flaw was found in the way QEMU's IDE device
driver handled the execution of SMART EXECUTE OFFLINE commands.
A privileged guest user could use this flaw to 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. (CVE-2014-2894)
The CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536,
CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and
CVE-2014-3461 issues were discovered by Michael S. Tsirkin of Red Hat,
Anthony Liguori, and Michael Roth.
This update also fixes the following bugs:
* Previously, under certain circumstances, libvirt failed to start guests
which used a non-zero PCI domain and SR-IOV Virtual Functions (VFs), and
returned the following error message:
Can't assign device inside non-zero PCI segment as this KVM module doesn't
support it.
This update fixes this issue and guests using the aforementioned
configuration no longer fail to start. (BZ#1099941)
* Due to an incorrect initialization of the cpus_sts bitmap, which holds
the enablement status of a vCPU, libvirt could fail to start a guest with
an unusual vCPU topology (for example, a guest with three cores and two
sockets). With this update, the initialization of cpus_sts has been
corrected, and libvirt no longer fails to start the aforementioned guests.
(BZ#1100575)
All qemu-kvm users 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.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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"text": "Updated qemu-kvm packages that fix multiple security issues and two bugs\nare now available for Red Hat Enterprise Linux 6.\n\nThe Red Hat Security Response Team has rated this update as having Moderate\nsecurity impact. Common Vulnerability Scoring System (CVSS) base scores,\nwhich give detailed severity ratings, are available for each vulnerability\nfrom the CVE links in the References section.",
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"text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. The qemu-kvm package provides the\nuser-space component for running virtual machines using KVM.\n\nMultiple buffer overflow, input validation, and out-of-bounds write flaws\nwere found in the way the virtio, virtio-net, virtio-scsi, and usb drivers\nof QEMU handled state loading after migration. A user able to alter the\nsavevm data (either on the disk or over the wire during migration) could\nuse either of these flaws to corrupt QEMU process memory on the\n(destination) host, which could potentially result in arbitrary code\nexecution on the host with the privileges of the QEMU process.\n(CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536, CVE-2013-4541,\nCVE-2013-4542, CVE-2013-6399, CVE-2014-0182, CVE-2014-3461)\n\nAn out-of-bounds memory access flaw was found in the way QEMU\u0027s IDE device\ndriver handled the execution of SMART EXECUTE OFFLINE commands.\nA privileged guest user could use this flaw to corrupt QEMU process memory\non the host, which could potentially result in arbitrary code execution on\nthe host with the privileges of the QEMU process. (CVE-2014-2894)\n\nThe CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536,\nCVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and\nCVE-2014-3461 issues were discovered by Michael S. Tsirkin of Red Hat,\nAnthony Liguori, and Michael Roth.\n\nThis update also fixes the following bugs:\n\n* Previously, under certain circumstances, libvirt failed to start guests\nwhich used a non-zero PCI domain and SR-IOV Virtual Functions (VFs), and\nreturned the following error message:\n\nCan\u0027t assign device inside non-zero PCI segment as this KVM module doesn\u0027t\nsupport it.\n\nThis update fixes this issue and guests using the aforementioned\nconfiguration no longer fail to start. (BZ#1099941)\n\n* Due to an incorrect initialization of the cpus_sts bitmap, which holds\nthe enablement status of a vCPU, libvirt could fail to start a guest with\nan unusual vCPU topology (for example, a guest with three cores and two\nsockets). With this update, the initialization of cpus_sts has been\ncorrected, and libvirt no longer fails to start the aforementioned guests.\n(BZ#1100575)\n\nAll qemu-kvm users are advised to upgrade to these updated packages, which\ncontain backported patches to correct these issues. After installing this\nupdate, shut down all running virtual machines. Once all virtual machines\nhave shut down, start them again for this update to take effect.",
"title": "Details"
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2014:0743"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "HIGH",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 3.7,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:L/AC:H/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "Qemu: usb: fix up post load checks"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.