CVE-2018-5174

N/A

Published: June 11, 2018 at 09:00 PM UTC

Updated: June 17, 2026 at 01:59 AM UTC

4 products affected across 1 vendorFirefoxThunderbirdThunderbird ESR· also runs on 1 platform

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Severity

N/A

Exploit prediction

EPSS 2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox · Mozilla

95%

v < 52.8.0v < 60v < 60.0

Affected range stops below 60, so it looks safe — our inference, not a vendor statement

Affected range stops below 60.0, so it looks safe — our inference, not a vendor statement

microsoft-windows-10 (environment)

Thunderbird · Mozilla

95%

v < 52.8v < 52.8.0

Affected range stops below 52.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 52.8.0, so it looks safe — our inference, not a vendor statement

microsoft-windows-10 (environment)

Thunderbird ESR · Mozilla

95%

v < 52.8v < 52.8.0

Affected range stops below 52.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 52.8.0, so it looks safe — our inference, not a vendor statement

microsoft-windows-10 (environment)

Firefox ESR · Mozilla

60%

v < 52.8

Affected range stops below 52.8, so it looks safe — our inference, not a vendor statement

Affected range stops below 52.8.0, so it looks safe — our inference, not a vendor statement

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Windows 10 · Microsoft

95%

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

VDB Entryx_refsource_BIDThird Party Advisory

Source: [email protected]

http://www.securityfocus.com/bid/104136

VDB Entryx_refsource_SECTRACKThird Party Advisory

Source: [email protected]

http://www.securitytracker.com/id/1040896

x_refsource_CONFIRMIssue TrackingPermissions RequiredThird Party Advisory

Source: [email protected]

https://bugzilla.mozilla.org/show_bug.cgi?id=1447080

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2018-11/

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2018-12/

x_refsource_CONFIRMVendor Advisory

Source: [email protected]

https://www.mozilla.org/security/advisories/mfsa2018-13/

CVSS

5MEDIUM[email protected]

Confidentiality: NONE
Integrity: PARTIAL
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfo

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