rhsa-2020_1936
Vulnerability from csaf_redhat
Published
2020-05-04 10:18
Modified
2024-11-15 08:29
Summary
Red Hat Security Advisory: OpenShift Container Platform 4.4.3 haproxy security update

Notes

Topic
An update for haproxy is now available for Red Hat OpenShift Container Platform 4.4. 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
Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. Security Fix(es): * haproxy: malformed HTTP/2 requests could lead to out-of-bounds writes (CVE-2020-11100) * haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated "chunked" value (CVE-2019-18277) * haproxy: HTTP/2 implementation was vulnerable to intermediary encapsulation attacks (CVE-2019-19330) 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.
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": "Red Hat OpenShift Container Platform is Red Hat\u0027s cloud computing\nKubernetes application platform solution designed for on-premise or private\ncloud deployments.\n\nSecurity Fix(es):\n\n* haproxy: malformed HTTP/2 requests could lead to out-of-bounds writes (CVE-2020-11100)\n\n* haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated \"chunked\" value (CVE-2019-18277)\n\n* haproxy: HTTP/2 implementation was vulnerable to intermediary encapsulation attacks (CVE-2019-19330)\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(s)\nlisted in the References section.",
        "title": "Details"
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          "category": "description",
          "text": "A flaw was found in HAProxy before 2.0.6. In legacy mode, messages featuring a transfer-encoding header missing the \"chunked\" value were not being correctly rejected. The impact was limited but if combined with the \"http-reuse always\" setting, it could be used to help construct an HTTP request smuggling attack against a vulnerable component employing a lenient parser that would ignore the content-length header as soon as it saw a transfer-encoding one (even if not entirely valid according to the specification).",
          "title": "Vulnerability description"
        },
        {
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          "text": "haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated \"chunked\" value",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this vulnerability a vulnerable backend server is required. In particular the server should incorrectly parse the Transfer-Encoding HTTP header.\n\nThis issue did not affect the versions of haproxy as shipped with Red Hat Enterprise Linux 6, and 7 as they did not include support for `http-reuse` option.",
          "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.",
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-18277",
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      "release_date": "2019-09-13T00:00:00+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2020-05-04T10:18:55+00:00",
          "details": "For OpenShift Container Platform 4.4 see the following documentation, which\nwill be updated shortly for release 4.4.3, for important instructions on\nhow to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html\n\nDetails on how to access this content are available at\nhttps://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.",
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          "url": "https://access.redhat.com/errata/RHSA-2020:1936"
        },
        {
          "category": "workaround",
          "details": "- Reconsider the use of `http-reuse always` if possible\n- Disable HTTP Keep-Alive (also called HTTP Connection reuse) in the backend\n- Fix the backend server to correctly parse Transfer-Encoding/Content-Length headers",
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            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L",
            "version": "3.0"
          },
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        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated \"chunked\" value"
    },
    {
      "cve": "CVE-2019-19330",
      "cwe": {
        "id": "CWE-20",
        "name": "Improper Input Validation"
      },
      "discovery_date": "2019-11-27T00:00:00+00:00",
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          "system_name": "Red Hat Bugzilla ID",
          "text": "1777584"
        }
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          "category": "description",
          "text": "The HTTP/2 implementation in HAProxy before 2.0.10 mishandles headers, as demonstrated by carriage return (CR, ASCII 0xd), line feed (LF, ASCII 0xa), and the zero character (NUL, ASCII 0x0), aka Intermediary Encapsulation Attacks.",
          "title": "Vulnerability description"
        },
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          "text": "haproxy: HTTP/2 implementation vulnerable to intermediary encapsulation attacks",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Support for HTTP/2 protocol was added to haproxy in version 1.8, therefore previous versions are not affected by this flaw.\n\nThe version of haproxy shipped in OpenShift Container Platform 4 contains the vulnerable code, however exploitation requires setting ROUTER_USE_HTTP2 in the OpenShift Ingress Operator, which is not currently possible. The impact of this vulnerability is therefore reduced in OpenShift Container Platform 4 to Low.",
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        },
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          "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.",
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          "8Base-RHOSE-4.4:haproxy-0:2.0.13-3.el8.src",
          "8Base-RHOSE-4.4:haproxy-debugsource-0:2.0.13-3.el8.x86_64",
          "8Base-RHOSE-4.4:haproxy20-0:2.0.13-3.el8.x86_64",
          "8Base-RHOSE-4.4:haproxy20-debuginfo-0:2.0.13-3.el8.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2019-19330"
        },
        {
          "category": "external",
          "summary": "RHBZ#1777584",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1777584"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2019-19330",
          "url": "https://www.cve.org/CVERecord?id=CVE-2019-19330"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2019-19330",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19330"
        }
      ],
      "release_date": "2019-11-25T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-05-04T10:18:55+00:00",
          "details": "For OpenShift Container Platform 4.4 see the following documentation, which\nwill be updated shortly for release 4.4.3, for important instructions on\nhow to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html\n\nDetails on how to access this content are available at\nhttps://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.",
          "product_ids": [
            "7Server-RH7-RHOSE-4.4:haproxy-0:2.0.13-3.el7.src",
            "7Server-RH7-RHOSE-4.4:haproxy-debuginfo-0:2.0.13-3.el7.x86_64",
            "7Server-RH7-RHOSE-4.4:haproxy20-0:2.0.13-3.el7.x86_64",
            "8Base-RHOSE-4.4:haproxy-0:2.0.13-3.el8.src",
            "8Base-RHOSE-4.4:haproxy-debugsource-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-debuginfo-0:2.0.13-3.el8.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:1936"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.0"
          },
          "products": [
            "7Server-RH7-RHOSE-4.4:haproxy-0:2.0.13-3.el7.src",
            "7Server-RH7-RHOSE-4.4:haproxy-debuginfo-0:2.0.13-3.el7.x86_64",
            "7Server-RH7-RHOSE-4.4:haproxy20-0:2.0.13-3.el7.x86_64",
            "8Base-RHOSE-4.4:haproxy-0:2.0.13-3.el8.src",
            "8Base-RHOSE-4.4:haproxy-debugsource-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-debuginfo-0:2.0.13-3.el8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "haproxy: HTTP/2 implementation vulnerable to intermediary encapsulation attacks"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "the HAProxy project"
          ]
        },
        {
          "names": [
            "Felix Wilhelm"
          ],
          "organization": "Google Project Zero",
          "summary": "Acknowledged by upstream."
        }
      ],
      "cve": "CVE-2020-11100",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2020-03-29T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1819111"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the way HAProxy processed certain HTTP/2 request packets. This flaw allows an attacker to send crafted HTTP/2 request packets, which cause memory corruption, leading to a crash or potential remote arbitrary code execution with the permissions of the user running HAProxy.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "haproxy: malformed HTTP/2 requests can lead to out-of-bounds writes",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "HAProxy packages shipped with Red Hat Enterprise Linux 6 and 7 do not contain support for HTTP/2; therefore, they are not affected by this flaw.\n\nOpenShift Container Platform versions through 4.3 contain the vulnerable code; exploitation requires setting ROUTER_USE_HTTP2 in the OpenShift Ingress Operator, which is not currently possible. The impact of this vulnerability is therefore reduced in OCP 4.x, prior to version 4.4, to low.\n\nOpenShift Container Platform 3.11 added a configuration option to ose-haproxy-router that made enabling HTTP/2 support easy. However, it is not enabled by default on that version.",
          "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": [
          "7Server-RH7-RHOSE-4.4:haproxy-0:2.0.13-3.el7.src",
          "7Server-RH7-RHOSE-4.4:haproxy-debuginfo-0:2.0.13-3.el7.x86_64",
          "7Server-RH7-RHOSE-4.4:haproxy20-0:2.0.13-3.el7.x86_64",
          "8Base-RHOSE-4.4:haproxy-0:2.0.13-3.el8.src",
          "8Base-RHOSE-4.4:haproxy-debugsource-0:2.0.13-3.el8.x86_64",
          "8Base-RHOSE-4.4:haproxy20-0:2.0.13-3.el8.x86_64",
          "8Base-RHOSE-4.4:haproxy20-debuginfo-0:2.0.13-3.el8.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-11100"
        },
        {
          "category": "external",
          "summary": "RHBZ#1819111",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1819111"
        },
        {
          "category": "external",
          "summary": "RHSB-haproxy",
          "url": "https://access.redhat.com/security/vulnerabilities/haproxy"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-11100",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-11100"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-11100",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-11100"
        },
        {
          "category": "external",
          "summary": "https://bugs.chromium.org/p/project-zero/issues/detail?id=2023",
          "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=2023"
        },
        {
          "category": "external",
          "summary": "https://www.haproxy.com/blog/haproxy-1-8-http-2-hpack-decoder-vulnerability-fixed/",
          "url": "https://www.haproxy.com/blog/haproxy-1-8-http-2-hpack-decoder-vulnerability-fixed/"
        },
        {
          "category": "external",
          "summary": "https://www.mail-archive.com/haproxy@formilux.org/msg36876.html",
          "url": "https://www.mail-archive.com/haproxy@formilux.org/msg36876.html"
        }
      ],
      "release_date": "2020-04-02T13:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2020-05-04T10:18:55+00:00",
          "details": "For OpenShift Container Platform 4.4 see the following documentation, which\nwill be updated shortly for release 4.4.3, for important instructions on\nhow to upgrade your cluster and fully apply this asynchronous errata\nupdate:\n\nhttps://docs.openshift.com/container-platform/4.4/release_notes/ocp-4-4-release-notes.html\n\nDetails on how to access this content are available at\nhttps://docs.openshift.com/container-platform/4.4/updating/updating-cluster-cli.html.",
          "product_ids": [
            "7Server-RH7-RHOSE-4.4:haproxy-0:2.0.13-3.el7.src",
            "7Server-RH7-RHOSE-4.4:haproxy-debuginfo-0:2.0.13-3.el7.x86_64",
            "7Server-RH7-RHOSE-4.4:haproxy20-0:2.0.13-3.el7.x86_64",
            "8Base-RHOSE-4.4:haproxy-0:2.0.13-3.el8.src",
            "8Base-RHOSE-4.4:haproxy-debugsource-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-debuginfo-0:2.0.13-3.el8.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2020:1936"
        },
        {
          "category": "workaround",
          "details": "This issue can be mitigated by not enabling support for HTTP/2 protocol. Upstream suggests that HTTP/2 can be enabled per front-end server by using the following documentation: https://www.haproxy.com/documentation/hapee/1-8r1/traffic-management/enable-http2-protocol/.\n\nYou can check if http2 is enabled by searching your haproxy configuration files for a line containing \u0027h2\u0027.\n\nTo mitigate this vulnerability in OpenShift Container Platform 3.11, keep HTTP/2 disabled as it is by default. You can verify if HTTP/2 support is enabled or not by following the instructions in following article: https://access.redhat.com/security/vulnerabilities/haproxy\n\nOn Red Hat Enterprise Linux 8, haproxy is confined by SELinux, which should mitigate remote arbitrary code execution.",
          "product_ids": [
            "7Server-RH7-RHOSE-4.4:haproxy-0:2.0.13-3.el7.src",
            "7Server-RH7-RHOSE-4.4:haproxy-debuginfo-0:2.0.13-3.el7.x86_64",
            "7Server-RH7-RHOSE-4.4:haproxy20-0:2.0.13-3.el7.x86_64",
            "8Base-RHOSE-4.4:haproxy-0:2.0.13-3.el8.src",
            "8Base-RHOSE-4.4:haproxy-debugsource-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-debuginfo-0:2.0.13-3.el8.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "7Server-RH7-RHOSE-4.4:haproxy-0:2.0.13-3.el7.src",
            "7Server-RH7-RHOSE-4.4:haproxy-debuginfo-0:2.0.13-3.el7.x86_64",
            "7Server-RH7-RHOSE-4.4:haproxy20-0:2.0.13-3.el7.x86_64",
            "8Base-RHOSE-4.4:haproxy-0:2.0.13-3.el8.src",
            "8Base-RHOSE-4.4:haproxy-debugsource-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-0:2.0.13-3.el8.x86_64",
            "8Base-RHOSE-4.4:haproxy20-debuginfo-0:2.0.13-3.el8.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "haproxy: malformed HTTP/2 requests can lead to out-of-bounds writes"
    }
  ]
}


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