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CVE

CVE-2018-5174

In the Windows 10 April 2018 Update, Windows Defender SmartScreen honors the "SEE_MASK_FLAG_NO_UI" flag associated with

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.

HIGH · CVSS 7.5 EPSS 0.0054
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
▤

Affected Products & Versions

4
mozilla firefox< 52.8.0
mozilla firefox< 60.0
mozilla thunderbird< 52.8.0
mozilla thunderbird esr< 52.8.0
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSQLite Firefox Profile Data DB Access
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.0 · security@mozilla.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 Jun 2018 · 09:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

8
suse-csafopenSUSE-SU-2024:14572-1
suse-csafopenSUSE-SU-2024:10600-1
suse-csafopenSUSE-SU-2024:10601-1
suse-csafSUSE-SU-2019:2872-1
suse-csafSUSE-SU-2018:1334-2
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/104136Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040896Third Party AdvisoryVDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1447080Issue TrackingPermissions RequiredThird Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-11/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-12/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-13/Vendor Advisory
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