#VU6330 Out-of-bounds read in Mozilla Firefox and Firefox ESR - CVE-2017-5447
Published: April 19, 2017 / Updated: September 14, 2018
Vulnerability identifier: #VU6330
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2017-5447
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerable software:
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error when processing glyph widths during text layout. A remote attacker can trigger out-of-bounds read and gain access to sensitive system memory.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Remediation
Update to Firefox 53, Firefox ESR 45.9 or Firefox ESR 52.1.