CVE-2023-45288 (GCVE-0-2023-45288)

Vulnerability from cvelistv5 – Published: 2024-04-04 20:37 – Updated: 2025-11-04 18:17
VLAI
Title
HTTP/2 CONTINUATION flood in net/http
Summary
An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request's headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
Go
References
Impacted products
Vendor Product Version
Go standard library net/http Affected: 0 , < 1.21.9 (semver)
Affected: 1.22.0-0 , < 1.22.2 (semver)
Create a notification for this product.
golang.org/x/net golang.org/x/net/http2 Affected: 0 , < 0.23.0 (semver)
Create a notification for this product.
go_standard_library net\/http Affected: 0 , < 1.21.9 (custom)
Affected: 1.22.0-0 , < 1.22.2 (custom)
    cpe:2.3:a:go_standard_library:net\/http:*:*:*:*:*:*:*:*
 Create a notification for this product.
golang http2 Affected: 0 , < 0.23.0 (custom)
    cpe:2.3:a:golang:http2:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Bartek Nowotarski (https://nowotarski.info/)
Show details on NVD website
To clipboard 

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          "value": "Bartek Nowotarski (https://nowotarski.info/)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request\u0027s headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-05-01T17:10:07.754Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/issue/65051"
        },
        {
          "url": "https://go.dev/cl/576155"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/YgW0sx8mN3M"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2024-2687"
        },
        {
          "url": "https://security.netapp.com/advisory/ntap-20240419-0009/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRYFHIQ6XRKRYBI2F5UESH67BJBQXUPT/"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2024/04/05/4"
        },
        {
          "url": "http://www.openwall.com/lists/oss-security/2024/04/03/16"
        }
      ],
      "title": "HTTP/2 CONTINUATION flood in net/http"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2023-45288",
    "datePublished": "2024-04-04T20:37:30.714Z",
    "dateReserved": "2023-10-06T17:06:26.221Z",
    "dateUpdated": "2025-11-04T18:17:43.583Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-45288",
      "date": "2026-07-13",
      "epss": "0.91969",
      "percentile": "0.99807"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request\u0027s headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.\"}, {\"lang\": \"es\", \"value\": \"Un atacante puede hacer que un endpoint HTTP/2 lea cantidades arbitrarias de datos de encabezado enviando una cantidad excesiva de tramas de CONTINUACI\\u00d3N. Mantener el estado de HPACK requiere analizar y procesar todos los encabezados y tramas de CONTINUACI\\u00d3N en una conexi\\u00f3n. Cuando los encabezados de una solicitud exceden MaxHeaderBytes, no se asigna memoria para almacenar los encabezados sobrantes, pero a\\u00fan as\\u00ed se analizan. Esto permite a un atacante hacer que un endpoint HTTP/2 lea cantidades arbitrarias de datos de encabezado, todos asociados con una solicitud que ser\\u00e1 rechazada. Estos encabezados pueden incluir datos codificados por Huffman, cuya decodificaci\\u00f3n es significativamente m\\u00e1s costosa para el receptor que para el atacante. La soluci\\u00f3n establece un l\\u00edmite en la cantidad de fotogramas de encabezado excedentes que procesaremos antes de cerrar una conexi\\u00f3n.\"}]",
      "id": "CVE-2023-45288",
      "lastModified": "2024-11-21T08:26:42.380",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}]}",
      "published": "2024-04-04T21:15:16.113",
      "references": "[{\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/03/16\", \"source\": \"security@golang.org\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/05/4\", \"source\": \"security@golang.org\"}, {\"url\": \"https://go.dev/cl/576155\", \"source\": \"security@golang.org\"}, {\"url\": \"https://go.dev/issue/65051\", \"source\": \"security@golang.org\"}, {\"url\": \"https://groups.google.com/g/golang-announce/c/YgW0sx8mN3M\", \"source\": \"security@golang.org\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRYFHIQ6XRKRYBI2F5UESH67BJBQXUPT/\", \"source\": \"security@golang.org\"}, {\"url\": \"https://pkg.go.dev/vuln/GO-2024-2687\", \"source\": \"security@golang.org\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240419-0009/\", \"source\": \"security@golang.org\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/03/16\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/05/4\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://go.dev/cl/576155\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://go.dev/issue/65051\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://groups.google.com/g/golang-announce/c/YgW0sx8mN3M\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRYFHIQ6XRKRYBI2F5UESH67BJBQXUPT/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://pkg.go.dev/vuln/GO-2024-2687\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240419-0009/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "security@golang.org",
      "vulnStatus": "Awaiting Analysis"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T03:06:23.000Z",
      "cve": "CVE-2023-45288",
      "id": "msrc_CVE-2023-45288",
      "initial_release_date": "2024-04-02T07:00:00.000Z",
      "product_status:fixed": "134",
      "product_status:known_affected": "134",
      "product_status:known_not_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "HTTP/2 CONTINUATION flood in net/http",
      "url": "https://msrc.microsoft.com/csaf/vex/2024/msrc_cve-2023-45288.json",
      "version": "269"
    },
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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-01T12:20:14+00:00",
      "cve": "CVE-2023-45288",
      "id": "CVE-2023-45288",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "1376",
      "product_status:known_affected": "169",
      "product_status:known_not_affected": "15865",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "golang: net/http, x/net/http2: unlimited number of CONTINUATION frames causes DoS",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-45288.json",
      "version": "3"
    },
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\"Framer.WriteSettings\"}, {\"name\": \"Framer.WriteSettingsAck\"}, {\"name\": \"Framer.WriteWindowUpdate\"}, {\"name\": \"GoAwayError.Error\"}, {\"name\": \"ReadFrameHeader\"}, {\"name\": \"Server.ServeConn\"}, {\"name\": \"Setting.String\"}, {\"name\": \"SettingID.String\"}, {\"name\": \"SettingsFrame.ForeachSetting\"}, {\"name\": \"StreamError.Error\"}, {\"name\": \"Transport.CloseIdleConnections\"}, {\"name\": \"Transport.NewClientConn\"}, {\"name\": \"Transport.RoundTrip\"}, {\"name\": \"Transport.RoundTripOpt\"}, {\"name\": \"bufferedWriter.Flush\"}, {\"name\": \"bufferedWriter.Write\"}, {\"name\": \"chunkWriter.Write\"}, {\"name\": \"clientConnPool.GetClientConn\"}, {\"name\": \"connError.Error\"}, {\"name\": \"dataBuffer.Read\"}, {\"name\": \"duplicatePseudoHeaderError.Error\"}, {\"name\": \"gzipReader.Close\"}, {\"name\": \"gzipReader.Read\"}, {\"name\": \"headerFieldNameError.Error\"}, {\"name\": \"headerFieldValueError.Error\"}, {\"name\": \"noDialClientConnPool.GetClientConn\"}, {\"name\": \"noDialH2RoundTripper.RoundTrip\"}, {\"name\": \"pipe.Read\"}, {\"name\": \"priorityWriteScheduler.CloseStream\"}, {\"name\": \"priorityWriteScheduler.OpenStream\"}, {\"name\": \"pseudoHeaderError.Error\"}, {\"name\": \"requestBody.Close\"}, {\"name\": \"requestBody.Read\"}, {\"name\": \"responseWriter.Flush\"}, {\"name\": \"responseWriter.FlushError\"}, {\"name\": \"responseWriter.Push\"}, {\"name\": \"responseWriter.SetReadDeadline\"}, {\"name\": \"responseWriter.SetWriteDeadline\"}, {\"name\": \"responseWriter.Write\"}, {\"name\": \"responseWriter.WriteHeader\"}, {\"name\": \"responseWriter.WriteString\"}, {\"name\": \"roundRobinWriteScheduler.OpenStream\"}, {\"name\": \"serverConn.CloseConn\"}, {\"name\": \"serverConn.Flush\"}, {\"name\": \"stickyErrWriter.Write\"}, {\"name\": \"transportResponseBody.Close\"}, {\"name\": \"transportResponseBody.Read\"}, {\"name\": \"writeData.String\"}]}], \"references\": [{\"url\": \"https://go.dev/issue/65051\"}, {\"url\": \"https://go.dev/cl/576155\"}, {\"url\": \"https://groups.google.com/g/golang-announce/c/YgW0sx8mN3M\"}, {\"url\": \"https://pkg.go.dev/vuln/GO-2024-2687\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240419-0009/\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRYFHIQ6XRKRYBI2F5UESH67BJBQXUPT/\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/05/4\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/04/03/16\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request\u0027s headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"description\": \"CWE-400: Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"shortName\": \"Go\", \"dateUpdated\": \"2024-05-01T17:10:07.754Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-45288\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T18:17:43.583Z\", \"dateReserved\": \"2023-10-06T17:06:26.221Z\", \"assignerOrgId\": \"1bb62c36-49e3-4200-9d77-64a1400537cc\", \"datePublished\": \"2024-04-04T20:37:30.714Z\", \"assignerShortName\": \"Go\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.