CVE-2018-5174

NameCVE-2018-5174
DescriptionIn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid69.0-1fixed
firefox-esr (PTS)jessie52.8.1esr-1~deb8u1fixed
jessie (security)60.9.0esr-1~deb8u1fixed
stretch60.7.1esr-1~deb9u1fixed
stretch (security)60.9.0esr-1~deb9u1fixed
buster60.8.0esr-1~deb10u1fixed
buster (security)60.9.0esr-1~deb10u1fixed
bullseye60.8.0esr-1fixed
sid68.1.0esr-1fixed
thunderbird (PTS)jessie1:52.8.0-1~deb8u1fixed
jessie (security)1:60.9.0-1~deb8u1fixed
stretch1:60.8.0-1~deb9u1fixed
stretch (security)1:60.9.0-1~deb9u1fixed
buster1:60.8.0-1~deb10u1fixed
buster (security)1:60.9.0-1~deb10u1fixed
bullseye, sid1:60.9.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)(not affected)
firefox-esrsource(unstable)(not affected)
thunderbirdsource(unstable)(not affected)

Notes

- firefox <not-affected> (Windows-specific)
- firefox-esr <not-affected> (Windows-specific)
- thunderbird <not-affected> (Windows-specific)
https://www.mozilla.org/en-US/security/advisories/mfsa2018-11/#CVE-2018-5174
https://www.mozilla.org/en-US/security/advisories/mfsa2018-12/#CVE-2018-5174
https://www.mozilla.org/en-US/security/advisories/mfsa2018-13/#CVE-2018-5174

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