#VU6333 Sendbox bypass in Mozilla Firefox and Firefox ESR - CVE-2017-5454
Published: April 19, 2017
Vulnerability identifier: #VU6333
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2017-5454
CWE-ID: CWE-265
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to read files from local filesystem.
The vulnerability exists due to an error in sendbox implementation. A remote attacker can use the file picker to access different files than those selected in the file picker through the use of relative paths.
Successful exploitation of the vulnerability may allow an attacker to read arbitrary files from the vulnerable system.
Remediation
Update to Firefox 53 or Firefox ESR 52.1.