github - ghsa-cx2r-fxw7-w76f

GHSA-CX2R-FXW7-W76F

Vulnerability from github – Published: 2022-05-13 01:52 – Updated: 2025-11-25 18:32

Details

In the Windows 10 April 2018 Update, Windows Defender SmartScreen honors the "SEE_MASK_FLAG_NO_UI" flag associated with downloaded files and will not show any UI. Files that are unknown and potentially dangerous will be allowed to run because SmartScreen will not prompt the user for a decision, and if the user is offline all files will be allowed to be opened because Windows won't prompt the user to ask what to do. Firefox incorrectly sets this flag when downloading files, leading to less secure behavior from SmartScreen. Note: this issue only affects Windows 10 users running the April 2018 update or later. It does not affect other Windows users or other operating systems. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

Severity ?

7.5 (High)


                  
                    CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2018-5174"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2018-06-11T21:29:00Z",
    "severity": "HIGH"
  },
  "details": "In the Windows 10 April 2018 Update, Windows Defender SmartScreen honors the \"SEE_MASK_FLAG_NO_UI\" flag associated with downloaded files and will not show any UI. Files that are unknown and potentially dangerous will be allowed to run because SmartScreen will not prompt the user for a decision, and if the user is offline all files will be allowed to be opened because Windows won\u0027t prompt the user to ask what to do. Firefox incorrectly sets this flag when downloading files, leading to less secure behavior from SmartScreen. Note: this issue only affects Windows 10 users running the April 2018 update or later. It does not affect other Windows users or other operating systems. This vulnerability affects Thunderbird \u003c 52.8, Thunderbird ESR \u003c 52.8, Firefox \u003c 60, and Firefox ESR \u003c 52.8.",
  "id": "GHSA-cx2r-fxw7-w76f",
  "modified": "2025-11-25T18:32:13Z",
  "published": "2022-05-13T01:52:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-5174"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1447080"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2018-11"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2018-12"
    },
    {
      "type": "WEB",
      "url": "https://www.mozilla.org/security/advisories/mfsa2018-13"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/104136"
    },
    {
      "type": "WEB",
      "url": "http://www.securitytracker.com/id/1040896"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2018-5174 (GCVE-0-2018-5174)

Vulnerability from cvelistv5 – Published: 2018-06-11 21:00 – Updated: 2024-08-05 05:26

Summary

Severity ?

No CVSS data available.

CWE

Windows Defender SmartScreen UI runs with less secure behavior for downloaded files in Windows 10 April 2018 Update

Assigner

mozilla

References

URL

Tags

	https://bugzilla.mozilla.org/show_bug.cgi?id=1447080	x_refsource_CONFIRM
	https://www.mozilla.org/security/advisories/mfsa2…	x_refsource_CONFIRM
	https://www.mozilla.org/security/advisories/mfsa2…	x_refsource_CONFIRM
	http://www.securitytracker.com/id/1040896	vdb-entryx_refsource_SECTRACK
	https://www.mozilla.org/security/advisories/mfsa2…	x_refsource_CONFIRM
	http://www.securityfocus.com/bid/104136	vdb-entryx_refsource_BID

Impacted products

Vendor

Product

Version

Mozilla

Thunderbird

Affected: unspecified , < 52.8 (custom)

Mozilla	Thunderbird ESR	Affected: unspecified , < 52.8 (custom)
Mozilla	Firefox	Affected: unspecified , < 60 (custom)
Mozilla	Firefox ESR	Affected: unspecified , < 52.8 (custom)

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JSON

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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-CX2R-FXW7-W76F

CVE-2018-5174 (GCVE-0-2018-5174)

Tags

Sightings

Nomenclature