CVE-2021-33620 (GCVE-0-2021-33620)

Vulnerability from cvelistv5 – Published: 2021-05-28 00:00 – Updated: 2024-08-03 23:58
VLAI?
Summary
Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server.
CWE
  • n/a
Assigner
Show details on NVD website

{
  "containers": {
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      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T23:58:21.468Z",
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        "references": [
          {
            "tags": [
              "x_transferred"
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            "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://www.squid-cache.org/Versions/v5/changesets/squid-5-8af775ed98bfd610f9ce762fe177e01b2675588c.patch"
          },
          {
            "tags": [
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            "url": "http://www.squid-cache.org/Versions/v4/changesets/squid-4-1e05a85bd28c22c9ca5d3ac9f5e86d6269ec0a8c.patch"
          },
          {
            "name": "FEDORA-2021-c0bec55ec7",
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          },
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            "name": "FEDORA-2021-24af72ff2c",
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          },
          {
            "name": "[debian-lts-announce] 20210614 [SECURITY] [DLA 2685-1] squid3 security update",
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            "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html"
          },
          {
            "name": "[oss-security] 20231011 Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
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            "url": "http://www.openwall.com/lists/oss-security/2023/10/11/3"
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            "tags": [
              "mailing-list",
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        "title": "CVE Program Container"
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    "cna": {
      "affected": [
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          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
            }
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Squid before 4.15 and 5.x before 5.0.6 allows remote servers to cause a denial of service (affecting availability to all clients) via an HTTP response. The issue trigger is a header that can be expected to exist in HTTP traffic without any malicious intent by the server."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:L/S:U/UI:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "description": "n/a",
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              "type": "text"
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      "providerMetadata": {
        "dateUpdated": "2023-10-17T04:06:14.805Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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          "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f"
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          "url": "http://www.squid-cache.org/Versions/v5/changesets/squid-5-8af775ed98bfd610f9ce762fe177e01b2675588c.patch"
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          "url": "http://www.squid-cache.org/Versions/v4/changesets/squid-4-1e05a85bd28c22c9ca5d3ac9f5e86d6269ec0a8c.patch"
        },
        {
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        },
        {
          "name": "FEDORA-2021-24af72ff2c",
          "tags": [
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          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T4EPIWUZDJAXADDHVOPKRBTQHPBR6H66/"
        },
        {
          "name": "[debian-lts-announce] 20210614 [SECURITY] [DLA 2685-1] squid3 security update",
          "tags": [
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          "url": "https://lists.debian.org/debian-lts-announce/2021/06/msg00014.html"
        },
        {
          "name": "[oss-security] 20231011 Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2023/10/11/3"
        },
        {
          "name": "20231016 Squid Caching Proxy Security Audit: 55 Vulnerabilities, 35 0days.",
          "tags": [
            "mailing-list"
          ],
          "url": "http://seclists.org/fulldisclosure/2023/Oct/14"
        }
      ]
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  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-33620",
    "datePublished": "2021-05-28T00:00:00.000Z",
    "dateReserved": "2021-05-28T00:00:00.000Z",
    "dateUpdated": "2024-08-03T23:58:21.468Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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Sightings

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  • 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.
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  • 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.


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