rhsa-2020_3907
Vulnerability from csaf_redhat
Published
2020-09-29 20:40
Modified
2024-11-15 05:22
Summary
Red Hat Security Advisory: qemu-kvm-ma security update

Notes

Topic
An update for qemu-kvm-ma is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Low. 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-ma packages provide the user-space component for running virtual machines that use KVM on the IBM z Systems, IBM Power, and 64-bit ARM architectures. Security Fix(es): * QEMU: seccomp: blacklist is not applied to all threads (CVE-2018-15746) * QEMU: vnc: memory leakage upon disconnect (CVE-2019-20382) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.9 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.


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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "QEMU: seccomp: blacklist is not applied to all threads"
    },
    {
      "cve": "CVE-2019-20382",
      "cwe": {
        "id": "CWE-772",
        "name": "Missing Release of Resource after Effective Lifetime"
      },
      "discovery_date": "2019-09-17T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1810390"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A memory leakage flaw was found in the way the VNC display driver of QEMU handled the connection disconnect when ZRLE and Tight encoding are enabled. Two VncState objects are created, and one allocates memory for the Zlib\u0027s data object. This allocated memory is not freed upon disconnection, resulting in a memory leak. An attacker able to connect to the VNC server could use this flaw to leak host memory,  leading to a potential denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: vnc: memory leakage upon disconnect",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw did not affect the versions of `qemu-kvm` as shipped with Red Hat Enterprise Linux 6 as they did not include the vulnerable code.",
          "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": {
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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-20382"
        },
        {
          "category": "external",
          "summary": "RHBZ#1810390",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1810390"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-20382",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-20382"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-20382",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20382"
        },
        {
          "category": "external",
          "summary": "https://www.openwall.com/lists/oss-security/2020/03/05/1",
          "url": "https://www.openwall.com/lists/oss-security/2020/03/05/1"
        }
      ],
      "release_date": "2019-09-17T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-09-29T20:40:27+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.",
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            "baseScore": 3.5,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "QEMU: vnc: memory leakage upon disconnect"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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