CVE-2019-11730

NameCVE-2019-11730
DescriptionA 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
ReferencesDLA-1869-1, DLA-1870-1, DSA-4479-1, DSA-4482-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid105.0-1fixed
firefox-esr (PTS)buster91.12.0esr-1~deb10u1fixed
buster (security)91.13.0esr-1~deb10u1fixed
bullseye91.13.0esr-1~deb11u1fixed
bullseye (security)102.3.0esr-1~deb11u1fixed
bookworm102.2.0esr-1fixed
sid102.3.0esr-1fixed
thunderbird (PTS)buster1:91.12.0-1~deb10u1fixed
buster (security)1:91.13.0-1~deb10u1fixed
bullseye (security), bullseye1:91.13.0-1~deb11u1fixed
bookworm1:102.2.2-1fixed
sid1:102.3.0-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)68.0-1
firefox-esrsourcejessie60.8.0esr-1~deb8u1DLA-1869-1
firefox-esrsourcestretch60.8.0esr-1~deb9u1DSA-4479-1
firefox-esrsourcebuster60.8.0esr-1~deb10u1DSA-4479-1
firefox-esrsource(unstable)60.8.0esr-1
thunderbirdsourcejessie1:60.8.0-1~deb8u1DLA-1870-1
thunderbirdsourcestretch1:60.8.0-1~deb9u1DSA-4482-1
thunderbirdsourcebuster1:60.8.0-1~deb10u1DSA-4482-1
thunderbirdsource(unstable)1:60.8.0-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11730
https://www.mozilla.org/en-US/security/advisories/mfsa2019-22/#CVE-2019-11730
https://www.mozilla.org/en-US/security/advisories/mfsa2019-23/#CVE-2019-11730

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