PT-2017-17945 · Mozilla+3 · Firefox+3

Konark · Published 2017-12-05 · Updated 2024-12-12 · CVE-2017-7843

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Firefox ESR versions prior to 52.5.2 Firefox versions prior to 57.0.1

Description The issue allows a web worker to write persistent data to IndexedDB when Private Browsing mode is used, enabling user fingerprinting. IndexedDB should be unavailable in Private Browsing mode, but the stored data persists across multiple private browsing sessions because it is not cleared upon exit.

Recommendations For Firefox ESR versions prior to 52.5.2, update to version 52.5.2 or later. For Firefox versions prior to 57.0.1, update to version 57.0.1 or later.

Exploit

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

ALT-PU-2017-2739

ALT-PU-2017-2782

ALT-PU-2018-1854

CESA-2017_3382

CVE-2017-7843

DLA-1202-1

DSA-4062-1

MGASA-2017-0448

MGASA-2018-0018

OPENSUSE-SU-2024:10600-1

OPENSUSE-SU-2024:14572-1

RHSA-2017:3382

RHSA-2017_3382

Affected Products

Alt Linux

Centos

Firefox

Red Hat

References · 1893

• 🔥 https://bugzilla.mozilla.org/show_bug.cgi?id=1410106 · Exploit
• https://advisories.mageia.org/MGASA-2018-0018.html · Security Note
• https://osv.dev/vulnerability/CVE-2017-7843 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:14572-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-7843 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-7843 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2017-19 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2017-0448.html · Security Note
• https://ubuntu.com/security/CVE-2017-7843 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2017-12 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2017-7843 · Vendor Advisory
• https://mozilla.org/security/advisories/mfsa2017-28 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2017-05 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2017-28 · Vendor Advisory
• https://mozilla.org/en-US/security/advisories/mfsa2017-25 · Vendor Advisory