CVE-2019-11730

MEDIUM 6.5CVE-2019-11730 · Published 23/07/2019 · updated 17/06/2026

Package	Affected versions	Patched versions
firefox mozilla	`< 68.0`	`68.0`
firefox esr mozilla	`< 60.8`	`60.8`
thunderbird mozilla	`< 60.8`	`60.8`

Description

A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

References

lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html · Mailing List
bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
lists.debian.org/debian-lts-announce/2019/08/msg00001.html · Mailing List
lists.debian.org/debian-lts-announce/2019/08/msg00002.html · Mailing List
security.gentoo.org/glsa/201908-12 · Third Party Advisory
security.gentoo.org/glsa/201908-20 · Third Party Advisory
mozilla.org/security/advisories/mfsa2019-21 · Vendor Advisory
mozilla.org/security/advisories/mfsa2019-22 · Vendor Advisory
mozilla.org/security/advisories/mfsa2019-23 · Vendor Advisory

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