RHSA-2016:2585

Vulnerability from csaf_redhat - Published: 2016-11-03 08:09 - Updated: 2025-11-21 17:58
Summary
Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update
Severity
Moderate
Notes
Topic: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. 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 AMD64 and Intel 64 systems. The qemu-kvm packages provide the user-space component for running virtual machines using KVM. Security Fix(es): * An integer overflow flaw and an out-of-bounds read flaw were found in the way QEMU's VGA emulator set certain VGA registers while in VBE mode. A privileged guest user could use this flaw to crash the QEMU process instance. (CVE-2016-3712) * An infinite loop flaw was found in the way QEMU's e1000 NIC emulation implementation processed data using transmit or receive descriptors under certain conditions. A privileged user inside a guest could use this flaw to crash the QEMU instance. (CVE-2016-1981) Red Hat would like to thank Zuozhi Fzz (Alibaba Inc.) for reporting CVE-2016-3712. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.
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.
CVE-2016-1981

An infinite loop flaw was found in the way QEMU's e1000 NIC emulation implementation processed data using transmit or receive descriptors under certain conditions. A privileged user inside a guest could use this flaw to crash the QEMU instance.

2.3 ()
AV:A/AC:M/Au:S/C:N/I:N/A:P
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 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. https://access.redhat.com/errata/RHSA-2016:2585
CVE-2016-3712

An integer overflow flaw and an out-of-bounds read flaw were found in the way QEMU's VGA emulator set certain VGA registers while in VBE mode. A privileged guest user could use this flaw to crash the QEMU process instance.

3.8 ()
AV:A/AC:M/Au:S/C:P/I:N/A:P
CWE-125 - Out-of-bounds Read
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 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. https://access.redhat.com/errata/RHSA-2016:2585
References
https://access.redhat.com/errata/RHSA-2016:2585 self
https://access.redhat.com/security/updates/classi… external
https://access.redhat.com/documentation/en-US/Red… external
https://bugzilla.redhat.com/show_bug.cgi?id=1156635 external
https://bugzilla.redhat.com/show_bug.cgi?id=1177318 external
https://bugzilla.redhat.com/show_bug.cgi?id=1252757 external
https://bugzilla.redhat.com/show_bug.cgi?id=1256741 external
https://bugzilla.redhat.com/show_bug.cgi?id=1265427 external
https://bugzilla.redhat.com/show_bug.cgi?id=1268345 external
https://bugzilla.redhat.com/show_bug.cgi?id=1268879 external
https://bugzilla.redhat.com/show_bug.cgi?id=1269738 external
https://bugzilla.redhat.com/show_bug.cgi?id=1272523 external
https://bugzilla.redhat.com/show_bug.cgi?id=1276036 external
https://bugzilla.redhat.com/show_bug.cgi?id=1277248 external
https://bugzilla.redhat.com/show_bug.cgi?id=1283116 external
https://bugzilla.redhat.com/show_bug.cgi?id=1298570 external
https://bugzilla.redhat.com/show_bug.cgi?id=1299116 external
https://bugzilla.redhat.com/show_bug.cgi?id=1299250 external
https://bugzilla.redhat.com/show_bug.cgi?id=1312289 external
https://bugzilla.redhat.com/show_bug.cgi?id=1318712 external
https://bugzilla.redhat.com/show_bug.cgi?id=1330969 external
https://bugzilla.redhat.com/show_bug.cgi?id=1333159 external
https://bugzilla.redhat.com/show_bug.cgi?id=1336491 external
https://bugzilla.redhat.com/show_bug.cgi?id=1340971 external
https://bugzilla.redhat.com/show_bug.cgi?id=1346982 external
https://bugzilla.redhat.com/show_bug.cgi?id=1351106 external
https://bugzilla.redhat.com/show_bug.cgi?id=1355730 external
https://bugzilla.redhat.com/show_bug.cgi?id=1360137 external
https://bugzilla.redhat.com/show_bug.cgi?id=1367040 external
https://bugzilla.redhat.com/show_bug.cgi?id=1371619 external
https://bugzilla.redhat.com/show_bug.cgi?id=1376542 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2016-1981 self
https://bugzilla.redhat.com/show_bug.cgi?id=1298570 external
https://www.cve.org/CVERecord?id=CVE-2016-1981 external
https://nvd.nist.gov/vuln/detail/CVE-2016-1981 external
https://access.redhat.com/security/cve/CVE-2016-3712 self
https://bugzilla.redhat.com/show_bug.cgi?id=1318712 external
https://www.cve.org/CVERecord?id=CVE-2016-3712 external
https://nvd.nist.gov/vuln/detail/CVE-2016-3712 external
Acknowledgments
Alibaba Inc. Zuozhi Fzz
To clipboard 

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    {
      "cve": "CVE-2016-1981",
      "cwe": {
        "id": "CWE-835",
        "name": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
      },
      "discovery_date": "2016-01-13T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1298570"
        }
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        {
          "category": "description",
          "text": "An infinite loop flaw was found in the way QEMU\u0027s e1000 NIC emulation implementation processed data using transmit or receive descriptors under certain conditions. A privileged user inside a guest could use this flaw to crash the QEMU instance.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Qemu: net: e1000 infinite loop in start_xmit and e1000_receive_iov routines",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue affects the versions of kvm and xen packages as shipped with Red Hat Enterprise Linux 5.\n\nThis issue affects the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6 and 7.\n\nThis issue affects the Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.\n\nThis issue affect the Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.\n\nThis 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"
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          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
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          "category": "general",
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            "7Workstation:qemu-img-10:1.5.3-126.el7.ppc64le",
            "7Workstation:qemu-img-10:1.5.3-126.el7.x86_64",
            "7Workstation:qemu-kvm-10:1.5.3-126.el7.src",
            "7Workstation:qemu-kvm-10:1.5.3-126.el7.x86_64",
            "7Workstation:qemu-kvm-common-10:1.5.3-126.el7.x86_64",
            "7Workstation:qemu-kvm-debuginfo-10:1.5.3-126.el7.ppc64",
            "7Workstation:qemu-kvm-debuginfo-10:1.5.3-126.el7.ppc64le",
            "7Workstation:qemu-kvm-debuginfo-10:1.5.3-126.el7.x86_64",
            "7Workstation:qemu-kvm-tools-10:1.5.3-126.el7.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "qemu-kvm: Out-of-bounds read when creating weird vga screen surface"
    }
  ]
}


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Tags
Taxonomy of the tags.




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.



Detection rules are retrieved from Rulezet.