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. IndexedDB should not be available in Private Browsing mode
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.89% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 86.6% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2018-06-11 21:00Z8 YR AGO
- Last updated
- 2024-08-05 16:19Z2 YR AGO
- Reserved
- 2017-04-12
- Assigning CNA
- mozilla
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 38e109a4493b9bd9a6bb89ceb6758de6faa99201d1bec95bdcb885c16cade8b6
05 Affected products
06 References
- access.redhat.comRHSA-2017:3382https://access.redhat.com/errata/RHSA-2017:3382
- lists.debian.org[debian-lts-announce] 20171210 [SECURITY] [DLA 1202-1] firefox-esr security updatehttps://lists.debian.org/debian-lts-announce/2017/12/msg00003.html
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-28/
- www.securitytracker.com1039954http://www.securitytracker.com/id/1039954
- www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2017-27/
- www.debian.orgDSA-4062https://www.debian.org/security/2017/dsa-4062
- bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1410106
- www.securityfocus.com102039http://www.securityfocus.com/bid/102039
- www.securityfocus.com102112http://www.securityfocus.com/bid/102112
07 Fixed in
Debian 12
- firefox-esr Fixed in 52.5.2esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- firefox-esr Fixed in 52.5.2esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- firefox-esr Fixed in 52.5.2esr-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- firefox Fixed in 57.0.1+build2-0ubuntu0.14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- firefox Fixed in 57.0.1+build2-0ubuntu0.16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- firefox Fixed in 57.0.1+build2-0ubuntu1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.