rhsa-2020_2730
Vulnerability from csaf_redhat
Published
2020-06-24 12:34
Modified
2024-11-05 22:22
Summary
Red Hat Security Advisory: qemu-kvm-rhev security update

Notes

Topic
An update for qemu-kvm-rhev is now available for Red Hat OpenStack Platform 13 (Queens). 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): * Slirp: OOB buffer access while emulating tcp protocols in tcp_emu() (CVE-2020-7039) * Slirp: potential OOB access due to unsafe snprintf() usages (CVE-2020-8608) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in 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.


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        "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on a variety of architectures. The qemu-kvm-rhev packages provide the\nuser-space component for running virtual machines that use KVM in\nenvironments managed by Red Hat products.\n\nSecurity Fix(es):\n\n* Slirp: OOB buffer access while emulating tcp protocols in tcp_emu() (CVE-2020-7039)\n* Slirp: potential OOB access due to unsafe snprintf() usages\n(CVE-2020-8608)\n\nFor more details about the security issue(s), including the impact, a CVSS\nscore, acknowledgments, and other related information, refer to the CVE\npage listed in the References section.",
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    {
      "acknowledgments": [
        {
          "names": [
            "Vishnu Dev TJ"
          ]
        }
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      "cve": "CVE-2020-7039",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "discovery_date": "2019-08-05T00:00:00+00:00",
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        {
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          "text": "1791551"
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      "notes": [
        {
          "category": "description",
          "text": "A heap buffer overflow issue was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the tcp_emu() routine while emulating IRC and other protocols. An attacker could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu()",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue affects user-mode or SLiRP networking implementation of the QEMU emulator. Though qemu-kvm package is built with SLiRP networking support, due to its limitations, it is not used by the virtual machine guests by default.\n\nThis issue affects versions of the qemu-kvm package as shipped with Red Hat Enterprise Linux 5, 6, 7, 8 and Red Hat Enterprise Linux Advanced Virtualization 8. Future qemu-kvm package updates for Red Hat Enterprise Linux 6, 7, 8 and Red Hat Enterprise Linux Advanced Virtualization 8 may address this issue.\n\nRed Hat Enterprise Linux 5 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This issue is currently not planned to be addressed in its future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.\n\nRed Hat OpenStack Platform:                                                                                                                 \n* This flaw impacts KVM user-mode or SLIRP networking, which is not used in Red Hat OpenStack Platform. Although updating is recommended for affected versions (see below), Red Hat OpenStack Platform environments are not vulnerable.",
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-7039"
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          "details": "Low"
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      "title": "QEMU: slirp: OOB buffer access while emulating tcp protocols in tcp_emu()"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Laszlo Ersek"
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      "cve": "CVE-2020-8608",
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      },
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      "ids": [
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          "text": "1798453"
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          "category": "description",
          "text": "An out-of-bounds heap buffer access flaw was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in tcp_emu() routine while emulating IRC and other protocols due to unsafe usage of the snprintf(3) function. A user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: Slirp: potential OOB access due to unsafe snprintf() usages",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue affects user-mode or SLiRP networking implementation of the QEMU emulator. Though qemu-kvm package is built with SLiRP networking support, due to its limitations, it is not used by the virtual machine guests by default.\n\nThis issue affects versions of the qemu-kvm package as shipped with Red Hat Enterprise Linux 5, 6, 7, 8 and Red Hat Enterprise Linux Advanced Virtualization 8. Future qemu-kvm package updates for Red Hat Enterprise Linux 6, 7, 8 and Red Hat Enterprise Linux Advanced Virtualization 8 may address this issue.\n\nRed Hat Enterprise Linux 5 is now in Maintenance Support 2 Phase of the support and maintenance life cycle. This issue is currently not planned to be addressed in its future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.\n\nRed Hat OpenStack Platform:                                                                                                                 \nThis flaw impacts KVM user-mode or SLIRP networking, which is not used in Red Hat OpenStack Platform. Although updating is recommended for affected versions (see below), Red Hat OpenStack Platform environments are not vulnerable.",
          "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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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-8608"
        },
        {
          "category": "external",
          "summary": "RHBZ#1798453",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1798453"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-8608",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-8608"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-8608",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-8608"
        }
      ],
      "release_date": "2020-01-27T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-06-24T12:34:49+00:00",
          "details": "For details on how to apply this update, which includes the changes\ndescribed in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:2730"
        },
        {
          "category": "workaround",
          "details": "This issue can only be resolved by applying updates.\n\nMitigation for this issue is either not available or the currently available options don\u0027t meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
            "version": "3.1"
          },
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "QEMU: Slirp: potential OOB access due to unsafe snprintf() usages"
    }
  ]
}


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