VulnerabilityModified
CVE-2017-7843
This vulnerability affects Firefox ESR < 52.5.2 and Firefox < 57.0.1.
HIGH 7.5EPSS 2.95%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 2.95% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- debian/debian linux · mozilla/firefox · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation
- Source
- security@mozilla.org
References
- http://www.securityfocus.com/bid/102039Issue Tracking, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/102112Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039954Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:3382Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1410106Exploit, Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00003.htmlThird Party Advisory
- https://www.debian.org/security/2017/dsa-4062Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-27/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-28/Vendor Advisory
- http://www.securityfocus.com/bid/102039Issue Tracking, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/102112Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039954Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:3382Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1410106Exploit, Issue Tracking, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00003.htmlThird Party Advisory
- https://www.debian.org/security/2017/dsa-4062Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-27/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-28/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.