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CVE-2018-5131 (GCVE-0-2018-5131)

Vulnerability from cvelistv5 – Published: 2018-06-11 21:00 – Updated: 2024-08-05 05:26
VLAI
Summary
Under certain circumstances the "fetch()" API can return transient local copies of resources that were sent with a "no-store" or "no-cache" cache header instead of downloading a copy from the network as it should. This can result in previously stored, locally cached data of a website being accessible to users if they share a common profile while browsing. This vulnerability affects Firefox ESR < 52.7 and Firefox < 59.
Severity
5.9 (Medium)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • Fetch API improperly returns cached copies of no-store/no-cache resources
Assigner
References
URL Tags
https://www.debian.org/security/2018/dsa-4139 vendor-advisoryx_refsource_DEBIAN
https://security.gentoo.org/glsa/201810-01 vendor-advisoryx_refsource_GENTOO
http://www.securityfocus.com/bid/103388 vdb-entryx_refsource_BID
https://access.redhat.com/errata/RHSA-2018:0527 vendor-advisoryx_refsource_REDHAT
https://lists.debian.org/debian-lts-announce/2018… mailing-listx_refsource_MLIST
https://www.mozilla.org/security/advisories/mfsa2… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2018:0526 vendor-advisoryx_refsource_REDHAT
https://bugzilla.mozilla.org/show_bug.cgi?id=1440775 x_refsource_CONFIRM
http://www.securitytracker.com/id/1040514 vdb-entryx_refsource_SECTRACK
https://usn.ubuntu.com/3596-1/ vendor-advisoryx_refsource_UBUNTU
https://www.mozilla.org/security/advisories/mfsa2… x_refsource_CONFIRM
Impacted products
Vendor Product Version CPE status
Mozilla Firefox ESR Affected: unspecified , < 52.7 (custom)
guessed Create a notification for this product.
Mozilla Firefox Affected: unspecified , < 59 (custom)
guessed Create a notification for this product.
Date Public
2018-03-13 00:00
Show details on NVD website
To clipboard 

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      "references": "[{\"url\": \"http://www.securityfocus.com/bid/103388\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.securitytracker.com/id/1040514\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:0526\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:0527\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://bugzilla.mozilla.org/show_bug.cgi?id=1440775\", \"source\": \"security@mozilla.org\", \"tags\": [\"Issue Tracking\", \"Permissions Required\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/03/msg00010.html\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://security.gentoo.org/glsa/201810-01\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://usn.ubuntu.com/3596-1/\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://www.debian.org/security/2018/dsa-4139\", \"source\": \"security@mozilla.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://www.mozilla.org/security/advisories/mfsa2018-06/\", \"source\": \"security@mozilla.org\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://www.mozilla.org/security/advisories/mfsa2018-07/\", \"source\": \"security@mozilla.org\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"http://www.securityfocus.com/bid/103388\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://www.securitytracker.com/id/1040514\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:0526\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2018:0527\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://bugzilla.mozilla.org/show_bug.cgi?id=1440775\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Issue Tracking\", \"Permissions Required\", \"Third Party Advisory\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2018/03/msg00010.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://security.gentoo.org/glsa/201810-01\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://usn.ubuntu.com/3596-1/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://www.debian.org/security/2018/dsa-4139\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://www.mozilla.org/security/advisories/mfsa2018-06/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://www.mozilla.org/security/advisories/mfsa2018-07/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}]",
      "sourceIdentifier": "security@mozilla.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-200\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2018-5131\",\"sourceIdentifier\":\"security@mozilla.org\",\"published\":\"2018-06-11T21:29:14.157\",\"lastModified\":\"2025-11-25T17:50:16.803\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Under certain circumstances the \\\"fetch()\\\" API can return transient local copies of resources that were sent with a \\\"no-store\\\" or \\\"no-cache\\\" cache header instead of downloading a copy from the network as it should. This can result in previously stored, locally cached data of a website being accessible to users if they share a common profile while browsing. This vulnerability affects Firefox ESR \u003c 52.7 and Firefox \u003c 59.\"},{\"lang\":\"es\",\"value\":\"Bajo ciertas circunstancias, la API \\\"fetch()\\\" puede devolver copias locales transitorias de recursos que se enviaron con una cabecera de cach\u00e9 \\\"no-store\\\" o \\\"no-cache\\\" en lugar de descargar una copia de la red, que es lo recomendado. Esto puede dar lugar a que los usuarios puedan acceder a los datos almacenados previamente y almacenados en la cach\u00e9 local de un sitio web si comparten un perfil com\u00fan durante la navegaci\u00f3n. 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-25T18:20:16+00:00",
      "cve": "CVE-2018-5131",
      "id": "CVE-2018-5131",
      "initial_release_date": "2018-03-14T00:00:00+00:00",
      "product_status:fixed": "210",
      "product_status:known_not_affected": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Mozilla: Fetch API improperly returns cached copies of no-store/no-cache resources (MFSA 2018-07)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2018/cve-2018-5131.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T08:50:46Z",
      "cve": "CVE-2018-5131",
      "id": "CVE-2018-5131",
      "initial_release_date": "2023-02-15T04:32:09Z",
      "product_status:known_affected": "2",
      "product_status:recommended": "307",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2018-5131",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2018-5131.json",
      "version": "18"
    }
  }
}



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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.