Security restrictions bypass in Mozilla Firefox - CVE-2017-7843
Published: December 5, 2017 / Updated: December 5, 2017
Vulnerability identifier: #VU9527
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-7843
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Mozilla Firefox
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass security restrictions on the target system.
The weakness exists in web worker while in Private Browsing mode due to improper input validation. A remote attacker can trick the victim into visiting a specially crafted website, bypass private-browsing protections and uniquely fingerprint visitors.to write persistent data to IndexedDB, which was not cleared when exiting and would persist across multiple sessions.
The weakness exists in web worker while in Private Browsing mode due to improper input validation. A remote attacker can trick the victim into visiting a specially crafted website, bypass private-browsing protections and uniquely fingerprint visitors.to write persistent data to IndexedDB, which was not cleared when exiting and would persist across multiple sessions.
How to mitigate CVE-2017-7843
Update to version 57.0.1.