CVE-2023-39325 (GCVE-0-2023-39325)

Vulnerability from cvelistv5 – Published: 2023-10-11 21:15 – Updated: 2025-02-13 17:02
VLAI
Title
HTTP/2 rapid reset can cause excessive work in net/http
Summary
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
Go
References
URL Tags
https://go.dev/issue/63417
https://go.dev/cl/534215
https://go.dev/cl/534235
https://groups.google.com/g/golang-announce/c/iNN…
https://pkg.go.dev/vuln/GO-2023-2102
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://security.netapp.com/advisory/ntap-2023111…
https://lists.fedoraproject.org/archives/list/pac…
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https://lists.fedoraproject.org/archives/list/pac…
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https://security.gentoo.org/glsa/202311-09
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Impacted products
Vendor Product Version
Go standard library net/http Affected: 0 , < 1.20.10 (semver)
Affected: 1.21.0-0 , < 1.21.3 (semver)
Create a notification for this product.
golang.org/x/net golang.org/x/net/http2 Affected: 0 , < 0.17.0 (semver)
Create a notification for this product.
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        "title": "CVE Program Container"
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    "cna": {
      "affected": [
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          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/http",
          "product": "net/http",
          "programRoutines": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en"
            }
          ]
        }
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        "shortName": "Go"
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        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PJCUNGIQDUMZ4Z6HWVYIMR66A35F5S74/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L5E5JSJBZLYXOTZWXHJKRVCIXIHVWKJ6/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YJWHBLVZDM5KQSDFRBFRKU5KSSOLIRQ4/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3WJ4QVX2AMUJ2F2S27POOAHRC4K3CHU4/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ODBY7RVMGZCBSTWF2OZGIZS57FNFUL67/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QXOU2JZUBEBP7GBKAYIJRPRBZSJCD7ST/"
        }
      ],
      "title": "HTTP/2 rapid reset can cause excessive work in net/http"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2023-39325",
    "datePublished": "2023-10-11T21:15:02.727Z",
    "dateReserved": "2023-07-27T17:05:55.188Z",
    "dateUpdated": "2025-02-13T17:02:50.341Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-39325",
      "date": "2026-07-03",
      "epss": "0.03796",
      "percentile": "0.88691"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"1.20.0\", \"versionEndExcluding\": \"1.20.10\", \"matchCriteriaId\": \"99C776A5-1409-4638-AB9A-8A2B053DBFE1\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*\", \"versionStartIncluding\": \"1.21.0\", \"versionEndExcluding\": \"1.21.3\", \"matchCriteriaId\": \"5FD9AB15-E5F6-4DBC-9EC7-D0ABA705802A\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:golang:http2:*:*:*:*:*:go:*:*\", \"versionEndExcluding\": \"0.17.0\", \"matchCriteriaId\": \"D7D2F801-6F65-4705-BCB9-D057EA54A707\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"E30D0E6F-4AE8-4284-8716-991DFA48CC5D\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"CC559B26-5DFC-4B7A-A27C-B77DE755DFF9\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646\"}]}]}, {\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:netapp:astra_trident:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"A4E44A7B-F32A-43F2-B41A-CB3049100DF7\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:netapp:astra_trident_autosupport:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"25008095-A75E-4E34-9538-61B6334BB0F9\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.\"}, {\"lang\": \"es\", \"value\": \"Un cliente HTTP/2 malicioso que crea solicitudes r\\u00e1pidamente y las restablece inmediatamente puede provocar un consumo excesivo de recursos del servidor. Si bien el n\\u00famero total de solicitudes est\\u00e1 limitado por la configuraci\\u00f3n http2.Server.MaxConcurrentStreams, restablecer una solicitud en curso permite al atacante crear una nueva solicitud mientras la existente a\\u00fan se est\\u00e1 ejecutando. Con la soluci\\u00f3n aplicada, los servidores HTTP/2 ahora vincularon el n\\u00famero de rutinas de controlador que se ejecutan simult\\u00e1neamente al l\\u00edmite de concurrencia de transmisi\\u00f3n (MaxConcurrentStreams). Las nuevas solicitudes que lleguen cuando se encuentre en el l\\u00edmite (lo que solo puede ocurrir despu\\u00e9s de que el cliente haya restablecido una solicitud existente en curso) se pondr\\u00e1n en cola hasta que salga un controlador. Si la cola de solicitudes crece demasiado, el servidor finalizar\\u00e1 la conexi\\u00f3n. Este problema tambi\\u00e9n se solucion\\u00f3 en golang.org/x/net/http2 para los usuarios que configuran HTTP/2 manualmente. El l\\u00edmite de simultaneidad de transmisiones predeterminado es 250 transmisiones (solicitudes) por conexi\\u00f3n HTTP/2. Este valor se puede ajustar utilizando el paquete golang.org/x/net/http2; consulte la configuraci\\u00f3n Server.MaxConcurrentStreams y la funci\\u00f3n ConfigureServer.\"}]",
      "id": "CVE-2023-39325",
      "lastModified": "2024-11-21T08:15:09.627",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"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": "2023-10-11T22:15:09.880",
      "references": "[{\"url\": \"https://go.dev/cl/534215\", \"source\": \"security@golang.org\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://go.dev/cl/534235\", \"source\": \"security@golang.org\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://go.dev/issue/63417\", \"source\": \"security@golang.org\", \"tags\": [\"Issue Tracking\", \"Vendor Advisory\"]}, {\"url\": \"https://groups.google.com/g/golang-announce/c/iNNxDTCjZvo/m/UDd7VKQuAAAJ\", \"source\": \"security@golang.org\", \"tags\": [\"Release Notes\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3OVW5V2DM5K5IC3H7O42YDUGNJ74J35O/\", \"source\": \"security@golang.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3SZN67IL7HMGMNAVLOTIXLIHUDXZK4LH/\", \"source\": \"security@golang.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3WJ4QVX2AMUJ2F2S27POOAHRC4K3CHU4/\", \"source\": \"security@golang.org\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4BUK2ZIAGCULOOYDNH25JPU6JBES5NF2/\", \"source\": \"security@golang.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5RSKA2II6QTD4YUKUNDVJQSRYSFC4VFR/\", \"source\": \"security@golang.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AVZDNSMVDAQJ64LJC5I5U5LDM5753647/\", \"source\": \"security@golang.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": 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      "sourceIdentifier": "security@golang.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-770\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-39325\",\"sourceIdentifier\":\"security@golang.org\",\"published\":\"2023-10-11T22:15:09.880\",\"lastModified\":\"2026-06-17T06:12:02.173\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.\"},{\"lang\":\"es\",\"value\":\"Un cliente HTTP/2 malicioso que crea solicitudes r\u00e1pidamente y las restablece inmediatamente puede provocar un consumo excesivo de recursos del servidor. Si bien el n\u00famero total de solicitudes est\u00e1 limitado por la configuraci\u00f3n http2.Server.MaxConcurrentStreams, restablecer una solicitud en curso permite al atacante crear una nueva solicitud mientras la existente a\u00fan se est\u00e1 ejecutando. Con la soluci\u00f3n aplicada, los servidores HTTP/2 ahora vincularon el n\u00famero de rutinas de controlador que se ejecutan simult\u00e1neamente al l\u00edmite de concurrencia de transmisi\u00f3n (MaxConcurrentStreams). Las nuevas solicitudes que lleguen cuando se encuentre en el l\u00edmite (lo que solo puede ocurrir despu\u00e9s de que el cliente haya restablecido una solicitud existente en curso) se pondr\u00e1n en cola hasta que salga un controlador. Si la cola de solicitudes crece demasiado, el servidor finalizar\u00e1 la conexi\u00f3n. Este problema tambi\u00e9n se solucion\u00f3 en golang.org/x/net/http2 para los usuarios que configuran HTTP/2 manualmente. El l\u00edmite de simultaneidad de transmisiones predeterminado es 250 transmisiones (solicitudes) por conexi\u00f3n HTTP/2. Este valor se puede ajustar utilizando el paquete golang.org/x/net/http2; consulte la configuraci\u00f3n Server.MaxConcurrentStreams y la funci\u00f3n ConfigureServer.\"}],\"affected\":[{\"source\":\"security@golang.org\",\"affectedData\":[{\"vendor\":\"Go standard library\",\"product\":\"net/http\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://pkg.go.dev\",\"packageName\":\"net/http\",\"programRoutines\":[{\"name\":\"http2serverConn.serve\"},{\"name\":\"http2serverConn.processHeaders\"},{\"name\":\"http2serverConn.upgradeRequest\"},{\"name\":\"http2serverConn.runHandler\"},{\"name\":\"ListenAndServe\"},{\"name\":\"ListenAndServeTLS\"},{\"name\":\"Serve\"},{\"name\":\"ServeTLS\"},{\"name\":\"Server.ListenAndServe\"},{\"name\":\"Server.ListenAndServeTLS\"},{\"name\":\"Server.Serve\"},{\"name\":\"Server.ServeTLS\"},{\"name\":\"http2Server.ServeConn\"}],\"versions\":[{\"version\":\"0\",\"lessThan\":\"1.20.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"1.21.0-0\",\"lessThan\":\"1.21.3\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"golang.org/x/net\",\"product\":\"golang.org/x/net/http2\",\"defaultStatus\":\"unaffected\",\"collectionURL\":\"https://pkg.go.dev\",\"packageName\":\"golang.org/x/net/http2\",\"programRoutines\":[{\"name\":\"serverConn.serve\"},{\"name\":\"serverConn.processHeaders\"},{\"name\":\"serverConn.upgradeRequest\"},{\"name\":\"serverConn.runHandler\"},{\"name\":\"Server.ServeConn\"}],\"versions\":[{\"version\":\"0\",\"lessThan\":\"0.17.0\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-770\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.20.0\",\"versionEndExcluding\":\"1.20.10\",\"matchCriteriaId\":\"99C776A5-1409-4638-AB9A-8A2B053DBFE1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"1.21.0\",\"versionEndExcluding\":\"1.21.3\",\"matchCriteriaId\":\"5FD9AB15-E5F6-4DBC-9EC7-D0ABA705802A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:golang:http2:*:*:*:*:*:go:*:*\",\"versionEndExcluding\":\"0.17.0\",\"matchCriteriaId\":\"D7D2F801-6F65-4705-BCB9-D057EA54A707\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"E30D0E6F-4AE8-4284-8716-991DFA48CC5D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"CC559B26-5DFC-4B7A-A27C-B77DE755DFF9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B8EDB836-4E6A-4B71-B9B2-AA3E03E0F646\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:netapp:astra_trident:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A4E44A7B-F32A-43F2-B41A-CB3049100DF7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:netapp:astra_trident_autosupport:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"25008095-A75E-4E34-9538-61B6334BB0F9\"}]}]}],\"references\":[{\"url\":\"https://go.dev/cl/534215\",\"source\":\"security@golang.org\",\"tags\":[\"Vendor 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  }
}


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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.