vulnwire
7.5high

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.

Published 8 y ago · modified 4 mo ago · JSON

CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
2.9%
percentile 87%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

2.89% probability of exploitation in the next 30 days, higher than 87% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD2.05.0AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Mozilla Firefox ESR
  • Mozilla Firefox

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

  • access.redhat.com /errata/RHSA-2017:3382 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • lists.debian.org /debian-lts-announce/2017/12/msg00003.html · mailing-list, x_refsource_MLIST, x_transferred
  • mozilla.org /security/advisories/mfsa2017-28/ · x_refsource_CONFIRM, x_transferred
  • securitytracker.com /id/1039954 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • mozilla.org /security/advisories/mfsa2017-27/ · x_refsource_CONFIRM, x_transferred
  • debian.org /security/2017/dsa-4062 · vendor-advisory, x_refsource_DEBIAN, x_transferred
  • bugzilla.mozilla.org /show_bug.cgi?id=1410106 · x_refsource_CONFIRM, x_transferred
  • securityfocus.com /bid/102039 · vdb-entry, x_refsource_BID, x_transferred
  • securityfocus.com /bid/102112 · vdb-entry, x_refsource_BID, x_transferred

Sources

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