csaf_redhat - rhsa-2015

rhsa-2015_1931

Vulnerability from csaf_redhat

Published

2015-10-26 21:22

Modified

2024-11-14 18:11

Summary

Red Hat Security Advisory: qemu-kvm-rhev security update

Notes

Topic

Updated qemu-kvm-rhev packages that fix one security issue are now available for Red Hat Enterprise Virtualization Hypervisor 7. Red Hat Product Security has rated this update as having Moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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. It was found that the QEMU's websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest's VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU. (CVE-2015-1779) This issue was discovered by Daniel P. Berrange of Red Hat. All qemu-kvm-rhev users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 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.

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.

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{
  "document": {
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      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Moderate"
    },
    "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/"
      }
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    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Updated qemu-kvm-rhev packages that fix one security issue are now\navailable for Red Hat Enterprise Virtualization Hypervisor 7.\n\nRed Hat Product Security has rated this update as having Moderate security\nimpact. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available from the CVE link in the\nReferences section.",
        "title": "Topic"
      },
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        "category": "general",
        "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the\nuser-space component for running virtual machines using KVM.\n\nIt was found that the QEMU\u0027s websocket frame decoder processed incoming\nframes without limiting resources used to process the header and the\npayload. An attacker able to access a guest\u0027s VNC console could use this\nflaw to trigger a denial of service on the host by exhausting all available\nmemory and CPU. (CVE-2015-1779)\n\nThis issue was discovered by Daniel P. Berrange of Red Hat.\n\nAll qemu-kvm-rhev users are advised to upgrade to these updated packages,\nwhich contain a backported patch to correct this issue. After installing\nthis update, shut down all running virtual machines. Once all virtual\nmachines have shut down, start them again for this update to take effect.",
        "title": "Details"
      },
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        "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"
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        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2015/rhsa-2015_1931.json"
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    "title": "Red Hat Security Advisory: qemu-kvm-rhev security update",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Daniel P. Berrange"
          ],
          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2015-1779",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2015-03-04T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1199572"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "It was found that the QEMU\u0027s websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest\u0027s VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "qemu: vnc: insufficient resource limiting in VNC websockets decoder",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue did not affect the kvm and qemu-kvm packages as shipped with Red Hat Enterprise Linux 5 and 6.",
          "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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          "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.1.2-23.el7_1.10.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2015-1779"
        },
        {
          "category": "external",
          "summary": "RHBZ#1199572",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1199572"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2015-1779",
          "url": "https://www.cve.org/CVERecord?id=CVE-2015-1779"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2015-1779",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-1779"
        }
      ],
      "release_date": "2015-03-23T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2015-10-26T21:22:29+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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      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 5.7,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:A/AC:M/Au:N/C:N/I:N/A:C",
            "version": "2.0"
          },
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            "7Server-RHEV-Agents-7:libcacard-rhev-10:2.1.2-23.el7_1.10.x86_64",
            "7Server-RHEV-Agents-7:libcacard-tools-rhev-10:2.1.2-23.el7_1.10.x86_64",
            "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.1.2-23.el7_1.10.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.1.2-23.el7_1.10.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.1.2-23.el7_1.10.src",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.1.2-23.el7_1.10.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.1.2-23.el7_1.10.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.1.2-23.el7_1.10.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "qemu: vnc: insufficient resource limiting in VNC websockets decoder"
    }
  ]
}

cve-2015-1779

Vulnerability from cvelistv5

Published

2016-01-12 19:00

Modified

2024-08-06 04:54

Severity ?

Summary

The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and CPU consumption) via a large (1) websocket payload or (2) HTTP headers section.

References

▼	URL	Tags
	http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00033.html	vendor-advisory, x_refsource_SUSE
	https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04896.html	mailing-list, x_refsource_MLIST
	http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155196.html	vendor-advisory, x_refsource_FEDORA
	http://www.debian.org/security/2015/dsa-3259	vendor-advisory, x_refsource_DEBIAN
	http://www.openwall.com/lists/oss-security/2015/04/09/6	mailing-list, x_refsource_MLIST
	http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html	vendor-advisory, x_refsource_SUSE
	http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154656.html	vendor-advisory, x_refsource_FEDORA
	https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04894.html	mailing-list, x_refsource_MLIST
	http://rhn.redhat.com/errata/RHSA-2015-1931.html	vendor-advisory, x_refsource_REDHAT
	http://www.openwall.com/lists/oss-security/2015/03/24/9	mailing-list, x_refsource_MLIST
	http://www.securitytracker.com/id/1033975	vdb-entry, x_refsource_SECTRACK
	http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html	x_refsource_CONFIRM
	http://rhn.redhat.com/errata/RHSA-2015-1943.html	vendor-advisory, x_refsource_REDHAT
	http://www.ubuntu.com/usn/USN-2608-1	vendor-advisory, x_refsource_UBUNTU
	https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04895.html	mailing-list, x_refsource_MLIST
	http://www.securityfocus.com/bid/73303	vdb-entry, x_refsource_BID
	https://security.gentoo.org/glsa/201602-01	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	n/a	n/a

Show details on NVD website

JSON

To clipboard

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          },
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            "name": "[oss-security] 20150409 Re: CVE-2015-1779 qemu: vnc: insufficient resource limiting in VNC websockets decoder",
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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.

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