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": "2026-07-21",
      "epss": "0.91969",
      "percentile": "0.99807"
    },
    "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"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-45288\",\"sourceIdentifier\":\"security@golang.org\",\"published\":\"2024-04-04T21:15:16.113\",\"lastModified\":\"2026-06-17T06:28:35.580\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"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. 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La soluci\u00f3n establece un l\u00edmite en la cantidad de fotogramas de encabezado excedentes que procesaremos antes de cerrar una conexi\u00f3n.\"}],\"affected\":[{\"source\":\"security@golang.org\",\"affectedData\":[{\"vendor\":\"Go standard 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    "redhat_vex": {
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      "current_release_date": "2026-07-18T22:33:01+00:00",
      "cve": "CVE-2023-45288",
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      "product_status:fixed": "1376",
      "product_status:known_affected": "170",
      "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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\"product\": \"net\\\\/http\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.21.9\", \"versionType\": \"custom\"}, {\"status\": \"affected\", \"version\": \"1.22.0-0\", \"lessThan\": \"1.22.2\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}, {\"cpes\": [\"cpe:2.3:a:golang:http2:*:*:*:*:*:*:*:*\"], \"vendor\": \"golang\", \"product\": \"http2\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"0.23.0\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-08-26T20:39:55.687Z\"}}], \"cna\": {\"title\": \"HTTP/2 CONTINUATION flood in net/http\", \"credits\": [{\"lang\": \"en\", \"value\": \"Bartek Nowotarski (https://nowotarski.info/)\"}], \"affected\": [{\"vendor\": \"Go standard library\", \"product\": \"net/http\", \"versions\": [{\"status\": \"affected\", \"version\": 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\"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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Tags
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.