rhsa-2023_1824
Vulnerability from csaf_redhat
Published
2023-04-18 14:10
Modified
2024-11-06 02:46
Summary
Red Hat Security Advisory: openvswitch2.15 security update

Notes

Topic
An update for openvswitch2.15 is now available for Fast Datapath 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
Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic. Security Fix(es): * openvswitch: ip proto 0 triggers incorrect handling (CVE-2023-1668) 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): * [23.C RHEL-8] Fast Datapath Release (BZ#2184496)
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": "An update for openvswitch2.15 is now available for Fast Datapath 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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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "David Marchand"
          ],
          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
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      "cve": "CVE-2023-1668",
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        "name": "Always-Incorrect Control Flow Implementation"
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          "text": "A flaw was found in openvswitch (OVS). When processing an IP packet with protocol 0, OVS will install the datapath flow without the action modifying the IP header. This issue results (for both kernel and userspace datapath) in installing a datapath flow matching all IP protocols (nw_proto is wildcarded) for this flow, but with an incorrect action, possibly causing incorrect handling of other IP packets with a != 0 IP protocol that matches this dp flow.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "openvswitch: ip proto 0 triggers incorrect handling",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "In OpenShift Container Platform (OCP) the openvswitch rpm package is consumed from the RHEL Fast Datapath repositories, hence OCP openvswitch components are marked as \"Will not fix\".",
          "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-2023-1668"
        },
        {
          "category": "external",
          "summary": "RHBZ#2137666",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2137666"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2023-1668",
          "url": "https://www.cve.org/CVERecord?id=CVE-2023-1668"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-1668",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-1668"
        },
        {
          "category": "external",
          "summary": "https://www.openwall.com/lists/oss-security/2023/04/06/1",
          "url": "https://www.openwall.com/lists/oss-security/2023/04/06/1"
        }
      ],
      "release_date": "2023-04-06T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-04-18T14:10:15+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",
          "product_ids": [
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            "8Base-Fast-Datapath:python3-openvswitch2.15-0:2.15.0-136.el8fdp.s390x",
            "8Base-Fast-Datapath:python3-openvswitch2.15-0:2.15.0-136.el8fdp.x86_64",
            "8Base-Fast-Datapath:python3-openvswitch2.15-debuginfo-0:2.15.0-136.el8fdp.aarch64",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2023:1824"
        },
        {
          "category": "workaround",
          "details": "For any version of Open vSwitch, preventing packets with network\nprotocol number \u00270\u0027 from reaching Open vSwitch will prevent the issue.\nThis is difficult to achieve because Open vSwitch obtains packets before\nthe iptables or nftables host firewall, so iptables or nftables on the\nOpen vSwitch host cannot ordinarily block the vulnerability.\n\nAnother method would be to add a high priority flow to the flow table\nexplicitly matching on nw protocol \u00270\u0027 and handling that traffic\nseparately:\n\n   table=0 priority=32768,ip,ip_proto=0 actions=drop\n\nThis would need to be similarly done for IPv6 traffic as well.",
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
            "version": "3.1"
          },
          "products": [
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            "8Base-Fast-Datapath:python3-openvswitch2.15-debuginfo-0:2.15.0-136.el8fdp.ppc64le",
            "8Base-Fast-Datapath:python3-openvswitch2.15-debuginfo-0:2.15.0-136.el8fdp.s390x",
            "8Base-Fast-Datapath:python3-openvswitch2.15-debuginfo-0:2.15.0-136.el8fdp.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "openvswitch: ip proto 0 triggers incorrect handling"
    }
  ]
}


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