rhsa-2020_5218
Vulnerability from csaf_redhat
Published
2020-11-24 13:11
Modified
2024-11-22 15:14
Summary
Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update

Notes

Topic
An update for imgbased, redhat-release-virtualization-host, and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 8. 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
The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. The ovirt-node-ng packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. The following packages have been upgraded to a later upstream version: imgbased (1.2.13), redhat-release-virtualization-host (4.4.3), redhat-virtualization-host (4.4.3). (BZ#1814517, BZ#1868293, BZ#1886484) Security Fix(es): * libssh: denial of service when handling AES-CTR (or DES) ciphers (CVE-2020-1730) 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. Bug Fix(es): * [security] gnutls_set_default_priority() (and thus Cockpit logins) fails when selecting VPP profile during RHVH installation (BZ#1835661) * Unable to upgrade from rhvh 4.4.1 to 4.4.2 as block storage domains are detected as local storage domains. (BZ#1886647) * Failed to install RHVH 4.4.3 due to missing Lvm ThinPool (BZ#1886695)
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": "Moderate"
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        "text": "An update for imgbased, redhat-release-virtualization-host, and redhat-virtualization-host is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 8.\n\nRed 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.",
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        "text": "The redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host\u0027s resources and performing administrative tasks.\n\nThe redhat-virtualization-host packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host\u0027s resources and performing administrative tasks. \n\nThe ovirt-node-ng packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host\u0027s resources and performing administrative tasks.\n\nThe following packages have been upgraded to a later upstream version: imgbased (1.2.13), redhat-release-virtualization-host (4.4.3), redhat-virtualization-host (4.4.3). (BZ#1814517, BZ#1868293, BZ#1886484)\n\nSecurity Fix(es):\n\n* libssh: denial of service when handling AES-CTR (or DES) ciphers (CVE-2020-1730)\n\nFor 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.\n\nBug Fix(es):\n\n* [security] gnutls_set_default_priority() (and thus Cockpit logins) fails when selecting VPP profile during RHVH installation (BZ#1835661)\n\n* Unable to upgrade from rhvh 4.4.1 to 4.4.2 as block storage domains are detected as local storage domains. (BZ#1886647)\n\n* Failed to install RHVH 4.4.3 due to missing Lvm ThinPool (BZ#1886695)",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "libssh team"
          ]
        },
        {
          "names": [
            "Yasheng Yang"
          ],
          "organization": "Google",
          "summary": "Acknowledged by upstream."
        }
      ],
      "cve": "CVE-2020-1730",
      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
      },
      "discovery_date": "2020-01-28T00:00:00+00:00",
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            "8Base-RHV-HypervisorBuild-4:python3-imgbased-0:1.2.13-0.1.el8ev.noarch",
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            "8Base-RHV-HypervisorBuild-4:redhat-release-virtualization-host-0:4.4.3-1.el8ev.x86_64",
            "8Base-RHV-HypervisorBuild-4:redhat-virtualization-host-image-update-placeholder-0:4.4.3-1.el8ev.noarch"
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      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1801998"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the way libssh handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn\u0027t been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "libssh: denial of service when handling AES-CTR (or DES) ciphers",
          "title": "Vulnerability summary"
        },
        {
          "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": [
          "8Base-RHV-Hypervisor-4:redhat-virtualization-host-0:4.4.3-20201116.0.el8_3.src",
          "8Base-RHV-Hypervisor-4:redhat-virtualization-host-image-update-0:4.4.3-20201116.0.el8_3.noarch"
        ],
        "known_not_affected": [
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          "8Base-RHV-HypervisorBuild-4:imgbased-0:1.2.13-0.1.el8ev.src",
          "8Base-RHV-HypervisorBuild-4:python3-imgbased-0:1.2.13-0.1.el8ev.noarch",
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-1730"
        },
        {
          "category": "external",
          "summary": "RHBZ#1801998",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1801998"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-1730",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-1730"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-1730",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-1730"
        },
        {
          "category": "external",
          "summary": "https://www.libssh.org/security/advisories/CVE-2020-1730.txt",
          "url": "https://www.libssh.org/security/advisories/CVE-2020-1730.txt"
        }
      ],
      "release_date": "2020-04-09T09:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2020-11-24T13:11:32+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/2974891",
          "product_ids": [
            "8Base-RHV-Hypervisor-4:redhat-virtualization-host-0:4.4.3-20201116.0.el8_3.src",
            "8Base-RHV-Hypervisor-4:redhat-virtualization-host-image-update-0:4.4.3-20201116.0.el8_3.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:5218"
        },
        {
          "category": "workaround",
          "details": "Disable AES-CTR ciphers (and DES in libssh 0.8). If you implement a server using libssh we advise to use a prefork model so each session runs in an own process. If you have implemented your server this way this is not really an issue. The client will kill its own connection.",
          "product_ids": [
            "8Base-RHV-Hypervisor-4:redhat-virtualization-host-0:4.4.3-20201116.0.el8_3.src",
            "8Base-RHV-Hypervisor-4:redhat-virtualization-host-image-update-0:4.4.3-20201116.0.el8_3.noarch",
            "8Base-RHV-HypervisorBuild-4:imgbased-0:1.2.13-0.1.el8ev.noarch",
            "8Base-RHV-HypervisorBuild-4:imgbased-0:1.2.13-0.1.el8ev.src",
            "8Base-RHV-HypervisorBuild-4:python3-imgbased-0:1.2.13-0.1.el8ev.noarch",
            "8Base-RHV-HypervisorBuild-4:redhat-release-virtualization-host-0:4.4.3-1.el8ev.src",
            "8Base-RHV-HypervisorBuild-4:redhat-release-virtualization-host-0:4.4.3-1.el8ev.x86_64",
            "8Base-RHV-HypervisorBuild-4:redhat-virtualization-host-image-update-placeholder-0:4.4.3-1.el8ev.noarch"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "8Base-RHV-Hypervisor-4:redhat-virtualization-host-0:4.4.3-20201116.0.el8_3.src",
            "8Base-RHV-Hypervisor-4:redhat-virtualization-host-image-update-0:4.4.3-20201116.0.el8_3.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "libssh: denial of service when handling AES-CTR (or DES) ciphers"
    }
  ]
}


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