rhsa-2017_0985
Vulnerability from csaf_redhat
Published
2017-04-18 06:06
Modified
2024-11-14 21:42
Summary
Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update
Notes
Topic
An update for qemu-kvm-rhev is now available for Red Hat Virtualization Hypervisor 7.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) 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 packages provide the user-space component for running virtual machines using KVM in environments managed by Red Hat Virtualization Manager.
Security Fix(es):
* Quick Emulator (QEMU), built with the Cirrus CLGD 54xx VGA Emulator and the VNC display driver support, is vulnerable to a heap buffer overflow issue. The issue could occur when a VNC client attempts to update its display after a VGA operation is performed by a guest. A privileged user/process inside guest could use this flaw to crash the QEMU process resulting in DoS or, potentially, leverage it to execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-9603)
Bug Fix(es):
* When attempting to use a virtual CPU with the "invtsc" feature, the "nonstop_tsc" flag was not set for the guest. This update adjusts the flag to be migrateable, and "nonstop_tsc" is now properly set when requested. (BZ#1413897)
* Previously, the QEMU emulator failed to open disk images with backing files stored on a Gluster volume. This update ensures that QEMU is able to handle Gluster disk URIs correctly, and the problem no longer occurs. (BZ#1425125)
* Prior to this update, creating a new GlusterFS instance in some cases consumed an excessive amount of memory. This update reuses data for existing GlusterFS volumes, which reduces the memory consumption when creating new instances. (BZ#1413044)
* Under certain circumstances, guest machines previously encountered I/O errors or were paused when a large number of block transfer actions was being performed. With this update, QEMU ensures that the number of block transfers does not exceed the host limit, which prevents the described problem. (BZ#1431149)
Enhancement(s):
* The QEMU emulator is now able to present virtual L3 cache information to the guest. This improves the performance and stability of tasks and processes that use L3 cache, such as SAP HANA. (BZ#1430802)
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.
{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for qemu-kvm-rhev is now available for Red Hat Virtualization Hypervisor 7.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev packages provide the user-space component for running virtual machines using KVM in environments managed by Red Hat Virtualization Manager.\n\nSecurity Fix(es):\n\n* Quick Emulator (QEMU), built with the Cirrus CLGD 54xx VGA Emulator and the VNC display driver support, is vulnerable to a heap buffer overflow issue. The issue could occur when a VNC client attempts to update its display after a VGA operation is performed by a guest. A privileged user/process inside guest could use this flaw to crash the QEMU process resulting in DoS or, potentially, leverage it to execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-9603)\n\nBug Fix(es):\n\n* When attempting to use a virtual CPU with the \"invtsc\" feature, the \"nonstop_tsc\" flag was not set for the guest. This update adjusts the flag to be migrateable, and \"nonstop_tsc\" is now properly set when requested. (BZ#1413897)\n\n* Previously, the QEMU emulator failed to open disk images with backing files stored on a Gluster volume. This update ensures that QEMU is able to handle Gluster disk URIs correctly, and the problem no longer occurs. (BZ#1425125)\n\n* Prior to this update, creating a new GlusterFS instance in some cases consumed an excessive amount of memory. This update reuses data for existing GlusterFS volumes, which reduces the memory consumption when creating new instances. (BZ#1413044)\n\n* Under certain circumstances, guest machines previously encountered I/O errors or were paused when a large number of block transfer actions was being performed. With this update, QEMU ensures that the number of block transfers does not exceed the host limit, which prevents the described problem. (BZ#1431149)\n\nEnhancement(s):\n\n* The QEMU emulator is now able to present virtual L3 cache information to the guest. This improves the performance and stability of tasks and processes that use L3 cache, such as SAP HANA. (BZ#1430802)", "title": "Details" }, { "category": "legal_disclaimer", "text": "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.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2017:0985", "url": "https://access.redhat.com/errata/RHSA-2017:0985" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1413044", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1413044" }, { "category": "external", "summary": "1413897", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1413897" }, { "category": "external", "summary": "1425125", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1425125" }, { "category": "external", "summary": "1430056", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1430056" }, { "category": "external", "summary": "1430802", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1430802" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2017/rhsa-2017_0985.json" } ], "title": "Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update", "tracking": { "current_release_date": "2024-11-14T21:42:39+00:00", "generator": { "date": "2024-11-14T21:42:39+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.2.1" } }, "id": "RHSA-2017:0985", "initial_release_date": "2017-04-18T06:06:24+00:00", "revision_history": [ { "date": "2017-04-18T06:06:24+00:00", "number": "1", "summary": "Initial 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"qemu-kvm-rhev-10:2.6.0-28.el7_3.9.src", "relates_to_product_reference": "7Server-RHEV-Agents-7" }, { "category": "default_component_of", "full_product_name": { "name": "qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64 as a component of RHEV-H and VDSM for 7 Hosts", "product_id": "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64" }, "product_reference": "qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64", "relates_to_product_reference": "7Server-RHEV-Agents-7" }, { "category": "default_component_of", "full_product_name": { "name": "qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le as a component of RHEV-H and VDSM for 7 Hosts", "product_id": "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le" }, "product_reference": "qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le", "relates_to_product_reference": "7Server-RHEV-Agents-7" }, { "category": "default_component_of", "full_product_name": { "name": "qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64 as a component of RHEV-H and VDSM for 7 Hosts", "product_id": "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64" }, "product_reference": "qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64", "relates_to_product_reference": "7Server-RHEV-Agents-7" }, { "category": "default_component_of", "full_product_name": { "name": "qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le as a component of RHEV-H and VDSM for 7 Hosts", "product_id": "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le" }, "product_reference": "qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le", "relates_to_product_reference": "7Server-RHEV-Agents-7" }, { "category": "default_component_of", "full_product_name": { "name": "qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64 as a component of RHEV-H and VDSM for 7 Hosts", "product_id": "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64" }, "product_reference": "qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64", "relates_to_product_reference": "7Server-RHEV-Agents-7" } ] }, "vulnerabilities": [ { "cve": "CVE-2016-9603", "cwe": { "id": "CWE-122", "name": "Heap-based Buffer Overflow" }, "discovery_date": "2016-11-16T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1430056" } ], "notes": [ { "category": "description", "text": "A heap buffer overflow flaw was found in QEMU\u0027s Cirrus CLGD 54xx VGA emulator\u0027s VNC display driver support; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.", "title": "Vulnerability description" }, { "category": "summary", "text": "Qemu: cirrus: heap buffer overflow via vnc connection", "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": [ "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.src", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.src", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2016-9603" }, { "category": "external", "summary": "RHBZ#1430056", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1430056" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2016-9603", "url": "https://www.cve.org/CVERecord?id=CVE-2016-9603" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2016-9603", "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-9603" } ], "release_date": "2017-03-14T00:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2017-04-18T06:06:24+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter 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.", "product_ids": [ "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.src", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.src", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2017:0985" } ], "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" }, "cvss_v3": { "attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "LOW", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L", "version": "3.0" }, "products": [ "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.src", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.src", "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.6.0-28.el7_3.9.x86_64", "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.ppc64le", "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.6.0-28.el7_3.9.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Important" } ], "title": "Qemu: cirrus: heap buffer overflow via vnc connection" } ] }
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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.