rhsa-2017_0309
Vulnerability from csaf_redhat
Published
2017-02-23 17:35
Modified
2024-11-14 19:59
Summary
Red Hat Security Advisory: qemu-kvm security and bug fix update
Notes
Topic
An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.
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
Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.
Security Fix(es):
* Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the Qemu process resulting in DoS or potentially execute arbitrary code on the host with privileges of Qemu process on the host. (CVE-2017-2615)
* An out-of-bounds read-access flaw was found in the QEMU emulator built with IP checksum routines. The flaw could occur when computing a TCP/UDP packet's checksum, because a QEMU function used the packet's payload length without checking against the data buffer's size. A user inside a guest could use this flaw to crash the QEMU process (denial of service). (CVE-2016-2857)
Red Hat would like to thank Wjjzhang (Tencent.com Inc.) Li Qiang (360.cn Inc.) for reporting CVE-2017-2615 and Ling Liu (Qihoo 360 Inc.) for reporting CVE-2016-2857.
This update also fixes the following bug:
* Previously, rebooting a guest virtual machine more than 128 times in a short period of time caused the guest to shut down instead of rebooting, because the virtqueue was not cleaned properly. This update ensures that the virtqueue is cleaned more reliably, which prevents the described problem from occurring. (BZ#1408389)
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.
{ "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 is now available for Red Hat Enterprise Linux 6.\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": "Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM.\n\nSecurity Fix(es):\n\n* Quick emulator (Qemu) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the Qemu process resulting in DoS or potentially execute arbitrary code on the host with privileges of Qemu process on the host. (CVE-2017-2615)\n\n* An out-of-bounds read-access flaw was found in the QEMU emulator built with IP checksum routines. The flaw could occur when computing a TCP/UDP packet\u0027s checksum, because a QEMU function used the packet\u0027s payload length without checking against the data buffer\u0027s size. A user inside a guest could use this flaw to crash the QEMU process (denial of service). (CVE-2016-2857)\n\nRed Hat would like to thank Wjjzhang (Tencent.com Inc.) Li Qiang (360.cn Inc.) for reporting CVE-2017-2615 and Ling Liu (Qihoo 360 Inc.) for reporting CVE-2016-2857.\n\nThis update also fixes the following bug:\n\n* Previously, rebooting a guest virtual machine more than 128 times in a short period of time caused the guest to shut down instead of rebooting, because the virtqueue was not cleaned properly. This update ensures that the virtqueue is cleaned more reliably, which prevents the described problem from occurring. (BZ#1408389)\n\nAll 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.", "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-2017:0309", "url": "https://access.redhat.com/errata/RHSA-2017:0309" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "1296567", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1296567" }, { "category": "external", "summary": "1408389", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1408389" }, { "category": "external", "summary": "1418200", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1418200" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2017/rhsa-2017_0309.json" } ], "title": "Red Hat Security Advisory: qemu-kvm security and bug fix update", "tracking": { "current_release_date": "2024-11-14T19:59:11+00:00", "generator": { "date": "2024-11-14T19:59:11+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.2.1" } }, "id": "RHSA-2017:0309", "initial_release_date": "2017-02-23T17:35:59+00:00", "revision_history": [ { "date": "2017-02-23T17:35:59+00:00", "number": "1", "summary": "Initial version" }, { "date": "2017-02-23T17:35:59+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2024-11-14T19:59:11+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, 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Hat Enterprise Linux Workstation (v. 6)", "product_id": "6Workstation-6.8.z:qemu-kvm-debuginfo-2:0.12.1.2-2.491.el6_8.6.x86_64" }, "product_reference": "qemu-kvm-debuginfo-2:0.12.1.2-2.491.el6_8.6.x86_64", "relates_to_product_reference": "6Workstation-6.8.z" }, { "category": "default_component_of", "full_product_name": { "name": "qemu-kvm-tools-2:0.12.1.2-2.491.el6_8.6.x86_64 as a component of Red Hat Enterprise Linux Workstation (v. 6)", "product_id": "6Workstation-6.8.z:qemu-kvm-tools-2:0.12.1.2-2.491.el6_8.6.x86_64" }, "product_reference": "qemu-kvm-tools-2:0.12.1.2-2.491.el6_8.6.x86_64", "relates_to_product_reference": "6Workstation-6.8.z" } ] }, "vulnerabilities": [ { "acknowledgments": [ { "names": [ "Ling Liu" ], "organization": "Qihoo 360 Inc." } ], "cve": "CVE-2016-2857", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "discovery_date": "2016-01-07T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1296567" } ], "notes": [ { "category": "description", "text": "An out-of-bounds read-access flaw was found in the QEMU emulator built with IP checksum routines. The flaw could occur when computing a TCP/UDP packet\u0027s checksum, because a QEMU function used the packet\u0027s payload length without checking against the data buffer\u0027s size. A user inside a guest could use this flaw to crash the QEMU process (denial of service).", "title": "Vulnerability description" }, { "category": "summary", "text": "Qemu: net: out of bounds read in net_checksum_calculate()", "title": "Vulnerability summary" }, { "category": "other", "text": "This has been rated as having Low security impact and is not currently\nplanned to be addressed in future updates. For additional information, refer\nto the Red Hat Enterprise Linux Life Cycle:\nhttps://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": [ "6Client-6.8.z:qemu-guest-agent-2:0.12.1.2-2.491.el6_8.6.i686", "6Client-6.8.z:qemu-guest-agent-2:0.12.1.2-2.491.el6_8.6.ppc64", "6Client-6.8.z:qemu-guest-agent-2:0.12.1.2-2.491.el6_8.6.x86_64", "6Client-6.8.z:qemu-img-2:0.12.1.2-2.491.el6_8.6.x86_64", "6Client-6.8.z:qemu-kvm-2:0.12.1.2-2.491.el6_8.6.src", "6Client-6.8.z:qemu-kvm-2:0.12.1.2-2.491.el6_8.6.x86_64", "6Client-6.8.z:qemu-kvm-debuginfo-2:0.12.1.2-2.491.el6_8.6.i686", "6Client-6.8.z:qemu-kvm-debuginfo-2:0.12.1.2-2.491.el6_8.6.ppc64", 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access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host.", "title": "Vulnerability description" }, { "category": "summary", "text": "Qemu: display: cirrus: oob access while doing bitblt copy backward mode", "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": [ "6Client-6.8.z:qemu-guest-agent-2:0.12.1.2-2.491.el6_8.6.i686", "6Client-6.8.z:qemu-guest-agent-2:0.12.1.2-2.491.el6_8.6.ppc64", "6Client-6.8.z:qemu-guest-agent-2:0.12.1.2-2.491.el6_8.6.x86_64", "6Client-6.8.z:qemu-img-2:0.12.1.2-2.491.el6_8.6.x86_64", "6Client-6.8.z:qemu-kvm-2:0.12.1.2-2.491.el6_8.6.src", 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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.