CVE-2017-7843

NameCVE-2017-7843
DescriptionWhen Private Browsing mode is used, it is possible for a web worker to write persistent data to IndexedDB and fingerprint a user uniquely. IndexedDB should not be available in Private Browsing mode and this stored data will persist across multiple private browsing mode sessions because it is not cleared when exiting. This vulnerability affects Firefox ESR < 52.5.2 and Firefox < 57.0.1.
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)
ReferencesDLA-1202-1, DSA-4062-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
firefox (PTS)sid60.0.2-1fixed
firefox-esr (PTS)jessie52.5.0esr-1~deb8u1vulnerable
jessie (security)52.8.1esr-1~deb8u1fixed
stretch52.6.0esr-1~deb9u1fixed
stretch (security)52.8.1esr-1~deb9u1fixed
buster, sid52.8.1esr-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
firefoxsource(unstable)57.0.1-1
firefox-esrsource(unstable)52.5.2esr-1
firefox-esrsourcejessie52.5.2esr-1~deb8u1DSA-4062-1
firefox-esrsourcestretch52.5.2esr-1~deb9u1DSA-4062-1
firefox-esrsourcewheezy52.5.2esr-1~deb7u1DLA-1202-1

Notes

https://www.mozilla.org/en-US/security/advisories/mfsa2017-27/#CVE-2017-7843
https://www.mozilla.org/en-US/security/advisories/mfsa2017-28/#CVE-2017-7843
https://bugzilla.mozilla.org/show_bug.cgi?id=1410106

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