CVE-2018-5174
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of data tampering.
- Exploit odds
- 1.8% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 1.8% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 1.8% · EPSS, next 30 days
- Record status
- Modified
Affected
- Mozilla Firefox < 52.8.0
- Mozilla Firefox < 60.0
- Mozilla Thunderbird < 52.8.0
- Mozilla Thunderbird Esr < 52.8.0
Attack profile CVSS 3.0 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Raw vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2018-5174.md and follow it. Check whether this project is affected by CVE-2018-5174. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://www.mozilla.org/security/advisories/mfsa2018-11/
- https://www.mozilla.org/security/advisories/mfsa2018-12/
- https://www.mozilla.org/security/advisories/mfsa2018-13/
- https://www.mozilla.org/security/advisories/mfsa2018-11/
- https://www.mozilla.org/security/advisories/mfsa2018-12/
- https://www.mozilla.org/security/advisories/mfsa2018-13/
References
- http://www.securityfocus.com/bid/104136
- http://www.securitytracker.com/id/1040896
- https://bugzilla.mozilla.org/show_bug.cgi?id=1447080
- https://www.mozilla.org/security/advisories/mfsa2018-11/
- https://www.mozilla.org/security/advisories/mfsa2018-12/
- https://www.mozilla.org/security/advisories/mfsa2018-13/
- http://www.securityfocus.com/bid/104136
- http://www.securitytracker.com/id/1040896
- https://bugzilla.mozilla.org/show_bug.cgi?id=1447080
- https://www.mozilla.org/security/advisories/mfsa2018-11/
- https://www.mozilla.org/security/advisories/mfsa2018-12/
- https://www.mozilla.org/security/advisories/mfsa2018-13/