RHSA-2017:0344

Vulnerability from csaf_redhat - Published: 2017-02-28 14:21 - Updated: 2025-11-21 17:59
Summary
Red Hat Security Advisory: qemu-kvm-rhev security update
Severity
Important
Notes
Topic: An update for qemu-kvm-rhev is now available for RHEV 3.X Hypervisor and Agents for RHEL-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: KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. 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.
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-2016-2857

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).

4.7 (Medium)
CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L
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-2017:0344
CVE-2017-2615

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.

5.5 (Medium)
CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CWE-787 - Out-of-bounds Write
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-2017:0344
References
Acknowledgments
Qihoo 360 Inc. Ling Liu
360.cn Inc. Li Qiang
Tencent.com Inc. Wjjzhang
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          "title": "Vulnerability description"
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            "integrityImpact": "NONE",
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            "baseScore": 4.7,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:L",
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    },
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          "names": [
            "Li Qiang"
          ],
          "organization": "360.cn Inc."
        },
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          "organization": "Tencent.com Inc."
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      "cwe": {
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          "title": "Vulnerability description"
        },
        {
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          "text": "Qemu: display: cirrus: oob access while doing bitblt copy backward mode",
          "title": "Vulnerability summary"
        },
        {
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          "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.",
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          "6Server-RHEV-Agents:qemu-kvm-rhev-tools-2:0.12.1.2-2.491.el6_8.6.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2017-2615"
        },
        {
          "category": "external",
          "summary": "RHBZ#1418200",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1418200"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2017-2615",
          "url": "https://www.cve.org/CVERecord?id=CVE-2017-2615"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-2615",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-2615"
        }
      ],
      "release_date": "2017-01-24T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2017-02-28T14:21:54+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": [
            "6Server-RHEV-Agents:qemu-img-rhev-2:0.12.1.2-2.491.el6_8.6.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.491.el6_8.6.src",
            "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.491.el6_8.6.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-debuginfo-2:0.12.1.2-2.491.el6_8.6.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-tools-2:0.12.1.2-2.491.el6_8.6.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2017:0344"
        }
      ],
      "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": [
            "6Server-RHEV-Agents:qemu-img-rhev-2:0.12.1.2-2.491.el6_8.6.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.491.el6_8.6.src",
            "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.491.el6_8.6.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-debuginfo-2:0.12.1.2-2.491.el6_8.6.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-tools-2:0.12.1.2-2.491.el6_8.6.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "Qemu: display: cirrus: oob access while doing bitblt copy backward mode"
    }
  ]
}


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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.