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CVE-2020-15049 (GCVE-0-2020-15049)

Vulnerability from cvelistv5 – Published: 2020-06-30 17:55 – Updated: 2024-08-04 13:08
VLAI
Summary
An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing "+\ "-" or an uncommon shell whitespace character prefix to the length field-value.
Severity
9.9 (Critical)
CVSS:3.1/AC:L/AV:N/A:H/C:H/I:H/PR:L/S:C/UI:N
CWE
  • n/a
Assigner
References
Date Public
2020-06-26 00:00
Show details on NVD website
To clipboard 

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      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-444\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-15049\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2020-06-30T18:15:12.367\",\"lastModified\":\"2024-11-21T05:04:41.830\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing \\\"+\\\\ \\\"-\\\" or an uncommon shell whitespace character prefix to the length field-value.\"},{\"lang\":\"es\",\"value\":\"Se detect\u00f3 un problema en el archivo http/ContentLengthInterpreter.cc en Squid versiones anteriores a 4.12 y versiones 5.x anteriores a 5.0.3. Un ataque de Trafico No Autorizado de Peticiones y Envenenamiento puede tener \u00e9xito contra la memoria cach\u00e9 HTTP. El cliente env\u00eda una petici\u00f3n HTTP con un encabezado Content-Length que contiene \\\"+\\\\\\\"-\\\" o un prefijo del car\u00e1cter espacio en blanco de shell poco com\u00fan en el valor de campo de longitud\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"cve@mitre.org\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H\",\"baseScore\":9.9,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.1,\"impactScore\":6.0},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:P/I:P/A:P\",\"baseScore\":6.5,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"PARTIAL\"},\"baseSeverity\":\"MEDIUM\",\"exploitabilityScore\":8.0,\"impactScore\":6.4,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-444\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.0\",\"versionEndIncluding\":\"2.6\",\"matchCriteriaId\":\"357FB8EB-55D7-40D8-918A-F8F2C1B6182A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"3.1\",\"versionEndIncluding\":\"3.5.28\",\"matchCriteriaId\":\"E3828B8E-1FF7-4707-BB24-6C7CABC37362\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.0\",\"versionEndExcluding\":\"4.12\",\"matchCriteriaId\":\"C3430B4A-4E1E-438D-9C84-4CFED6A3F023\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.0\",\"versionEndExcluding\":\"5.0.3\",\"matchCriteriaId\":\"137B599B-80D1-4903-8791-40F11BC3FCD9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"35C30CB9-FA3A-408D-A8B0-8805E75657BE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable2:*:*:*:*:*:*\",\"matchCriteriaId\":\"EFBB466C-C679-4B4B-87C2-E7853E5B3F04\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable3:*:*:*:*:*:*\",\"matchCriteriaId\":\"A03692DD-779F-4E3C-861C-29943870A816\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable4:*:*:*:*:*:*\",\"matchCriteriaId\":\"79FF6B3C-A3CE-4AA2-80F9-44D05A6B2F08\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable5:*:*:*:*:*:*\",\"matchCriteriaId\":\"3CF6E367-D33B-4B60-8C40-4618C47D53E8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable6:*:*:*:*:*:*\",\"matchCriteriaId\":\"0FA1F4FE-629C-4489-A13C-017A824C840F\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable7:*:*:*:*:*:*\",\"matchCriteriaId\":\"2479C5BF-94E1-4153-9FA3-333BC00F01D6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable8:*:*:*:*:*:*\",\"matchCriteriaId\":\"8ABFCCCC-7584-466E-97CC-6EBD3934A70E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:squid-cache:squid:2.7:stable9:*:*:*:*:*:*\",\"matchCriteriaId\":\"F17E49BF-FB11-4EE6-B6AC-30914F381B2F\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"80F0FA5D-8D3B-4C0E-81E2-87998286AF33\"}]}]}],\"references\":[{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://www.squid-cache.org/Versions/v4/changesets/squid-4-ea12a34d338b962707d5078d6d1fc7c6eb119a22.patch\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"http://www.squid-cache.org/Versions/v5/changesets/squid-5-485c9a7bb1bba88754e07ad0094647ea57a6eb8d.patch\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/squid-cache/squid/security/advisories/GHSA-qf3v-rc95-96j5\",\"source\":\"cve@mitre.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3RG5FGSTCAYVIJPJHIY3MRZ7NFT6HDO7/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20210312-0001/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://usn.ubuntu.com/4551-1/\",\"source\":\"cve@mitre.org\"},{\"url\":\"https://www.debian.org/security/2020/dsa-4732\",\"source\":\"cve@mitre.org\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00012.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"http://www.squid-cache.org/Versions/v4/changesets/squid-4-ea12a34d338b962707d5078d6d1fc7c6eb119a22.patch\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"http://www.squid-cache.org/Versions/v5/changesets/squid-5-485c9a7bb1bba88754e07ad0094647ea57a6eb8d.patch\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://github.com/squid-cache/squid/security/advisories/GHSA-qf3v-rc95-96j5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2020/10/msg00005.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3RG5FGSTCAYVIJPJHIY3MRZ7NFT6HDO7/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://security.netapp.com/advisory/ntap-20210312-0001/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/4551-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.debian.org/security/2020/dsa-4732\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:57:55+00:00",
      "cve": "CVE-2020-15049",
      "id": "CVE-2020-15049",
      "initial_release_date": "2020-06-26T00:00:00+00:00",
      "product_status:fixed": "98",
      "product_status:known_affected": "5",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "squid: Request smuggling and poisoning attack against the HTTP cache",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-15049.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-31T02:22:04Z",
      "cve": "CVE-2020-15049",
      "id": "CVE-2020-15049",
      "initial_release_date": "2023-02-15T03:57:08Z",
      "product_status:known_affected": "396",
      "product_status:recommended": "80",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-15049",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-15049.json",
      "version": "34"
    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.