High severity · published Jun 11, 2018
CVE-2017-7843
When Private Browsing mode is used, it is possible for a web worker to write persistent data to IndexedDB and fingerprint a user uniquely
7.5
CVSS
2.9%
EPSS
No
On KEV
Description
When 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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.9% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 57.0.1; before 52.5.2 · source: NVD
DL
Debian Linux · Debian
7.0; 8.0; 9.0 · source: NVD
EL
Enterprise Linux Desktop · Redhat
6.0; 7.0 · source: NVD
EL
Enterprise Linux Server · Redhat
6.0; 7.0 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
7.4 · source: NVD
EL
Enterprise Linux Server Eus · Redhat
7.4; 7.5 · source: NVD
EL
Enterprise Linux Workstation · Redhat
6.0; 7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-7843
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-7843
Issue Tracking
http://www.securityfocus.com/bid/102039
Third Party Advisory
http://www.securityfocus.com/bid/102112
Third Party Advisory
http://www.securitytracker.com/id/1039954
Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:3382
Exploit
https://bugzilla.mozilla.org/show_bug.cgi?id=1410106
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2017/12/msg00003.html
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