RHSA-2015:0624
Vulnerability from csaf_redhat - Published: 2015-03-05 09:37 - Updated: 2025-11-21 17:51Summary
Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update
Severity
Important
Notes
Topic: Updated qemu-kvm-rhev packages that fix multiple security issues, several
bugs, and add various enhancements are now available for Red Hat Enterprise
Virtualization Hypervisor 7.
Red Hat Product Security has rated this update as having Important 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-rhev package provides the
user-space component for running virtual machines using KVM, in
environments managed by Red Hat Enterprise Virtualization Manager.
It was found that the Cirrus blit region checks were insufficient.
A privileged guest user could use this flaw to write outside of
VRAM-allocated buffer boundaries in the host's QEMU process address space
with attacker-provided data. (CVE-2014-8106)
An uninitialized data structure use flaw was found in the way the
set_pixel_format() function sanitized the value of bits_per_pixel.
An attacker able to access a guest's VNC console could use this flaw to
crash the guest. (CVE-2014-7815)
It was found that certain values that were read when loading RAM during
migration were not validated. 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-2014-7840)
A NULL pointer dereference flaw was found in the way QEMU handled UDP
packets with a source port and address of 0 when QEMU's user networking was
in use. A local guest user could use this flaw to crash the guest.
(CVE-2014-3640)
Red Hat would like to thank James Spadaro of Cisco for reporting
CVE-2014-7815, and Xavier Mehrenberger and Stephane Duverger of Airbus for
reporting CVE-2014-3640. The CVE-2014-8106 issue was found by Paolo Bonzini
of Red Hat, and the CVE-2014-7840 issue was discovered by Michael S.
Tsirkin of Red Hat.
This update provides the enhanced version of the qemu-kvm-rhev packages for
Red Hat Enterprise Virtualization (RHEV) Hypervisor, which also fixes
several bugs and adds various enhancements.
All Red Hat Enterprise Virtualization users with deployed virtualization
hosts are advised to install these updated packages, which add this
enhancement. 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.
A NULL pointer dereference flaw was found in the way QEMU handled UDP packets with a source port and address of 0 when QEMU's user networking was in use. A local guest user could use this flaw to crash the guest.
4.4 ()
Vendor Fix
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:0624
An uninitialized data structure use flaw was found in the way the set_pixel_format() function sanitized the value of bits_per_pixel. An attacker able to access a guest's VNC console could use this flaw to crash the guest.
5.2 ()
Vendor Fix
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:0624
It was found that certain values that were read when loading RAM during migration were not validated. 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.
3.7 ()
Vendor Fix
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:0624
It was found that the Cirrus blit region checks were insufficient. A privileged guest user could use this flaw to write outside of VRAM-allocated buffer boundaries in the host's QEMU process address space with attacker-provided data.
4.9 ()
Vendor Fix
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2015:0624
References
Acknowledgments
Xavier Mehrenberger
Airbus
Stephane Duverger
Cisco
James Spadaro
Red Hat
Michael S. Tsirkin
Red Hat
Paolo Bonzini
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"title": "qemu: vnc: insufficient bits_per_pixel from the client sanitization"
},
{
"acknowledgments": [
{
"names": [
"Michael S. Tsirkin"
],
"organization": "Red Hat",
"summary": "This issue was discovered by Red Hat."
}
],
"cve": "CVE-2014-7840",
"cwe": {
"id": "CWE-122",
"name": "Heap-based Buffer Overflow"
},
"discovery_date": "2014-11-11T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1163075"
}
],
"notes": [
{
"category": "description",
"text": "It was found that certain values that were read when loading RAM during migration were not validated. 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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "qemu: insufficient parameter validation during ram load",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2014-7840"
},
{
"category": "external",
"summary": "RHBZ#1163075",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1163075"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2014-7840",
"url": "https://www.cve.org/CVERecord?id=CVE-2014-7840"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2014-7840",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-7840"
}
],
"release_date": "2014-11-12T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2015-03-05T09:37:35+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
"product_ids": [
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"7Server-RHEV-Agents-7:libcacard-tools-rhev-10:2.1.2-23.el7.x86_64",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2015:0624"
}
],
"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"
},
"products": [
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}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "qemu: insufficient parameter validation during ram load"
},
{
"acknowledgments": [
{
"names": [
"Paolo Bonzini"
],
"organization": "Red Hat",
"summary": "This issue was discovered by Red Hat."
}
],
"cve": "CVE-2014-8106",
"cwe": {
"id": "CWE-119",
"name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
},
"discovery_date": "2014-11-13T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1169454"
}
],
"notes": [
{
"category": "description",
"text": "It was found that the Cirrus blit region checks were insufficient. A privileged guest user could use this flaw to write outside of VRAM-allocated buffer boundaries in the host\u0027s QEMU process address space with attacker-provided data.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "qemu: cirrus: insufficient blit region checks",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue affects the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6, a future update may address this flaw.\n\nThis issue affects the kvm packages as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This issue is currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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"references": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2014-8106"
},
{
"category": "external",
"summary": "RHBZ#1169454",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1169454"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2014-8106",
"url": "https://www.cve.org/CVERecord?id=CVE-2014-8106"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2014-8106",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-8106"
}
],
"release_date": "2014-12-04T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2015-03-05T09:37:35+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2015:0624"
}
],
"scores": [
{
"cvss_v2": {
"accessComplexity": "MEDIUM",
"accessVector": "ADJACENT_NETWORK",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.9,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:A/AC:M/Au:S/C:P/I:P/A:P",
"version": "2.0"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "qemu: cirrus: insufficient blit region checks"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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