#VU7075 Information disclosure in Firefox ESR - CVE-2017-7764
Published: June 14, 2017 / Updated: May 26, 2020
Vulnerability identifier: #VU7075
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-7764
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Firefox ESR
Firefox ESR
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to perform spoofing attack.
The weakness exists due to mix of characters from the "Canadian Syllabics" unicode block with characters from other unicode blocks in the addressbar instead of being rendered as their raw "punycode" form. A remote attacker can use characters confusion to perform domain name spoofing attacks and read arbitrary files.
Successful exploitation of the vulnerability results in information disclosure.
The weakness exists due to mix of characters from the "Canadian Syllabics" unicode block with characters from other unicode blocks in the addressbar instead of being rendered as their raw "punycode" form. A remote attacker can use characters confusion to perform domain name spoofing attacks and read arbitrary files.
Successful exploitation of the vulnerability results in information disclosure.
Remediation
Update to version 52.2.