Out-of-bounds read in Firefox ESR and Mozilla Firefox - CVE-2017-5447

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Main Vulnerability Database Vulnerabilities #VU6330

Out-of-bounds read in Firefox ESR and Mozilla Firefox - CVE-2017-5447

Published: April 19, 2017 / Updated: September 14, 2018


Vulnerability identifier: #VU6330
CSH Severity: High
CVSS v4: 8.6 [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]
CVE-ID: CVE-2017-5447
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

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.


Affected software

Firefox ESR
Mozilla Firefox
Arch Linux
Gentoo Linux
Red Hat Enterprise Linux for x86_64
SUSE Linux
Ubuntu
Mozilla Thunderbird

How to mitigate CVE-2017-5447

Update to Firefox 53, Firefox ESR 45.9 or Firefox ESR 52.1.


Links to Public Exploits and PoC-codes

External References

Related Security Bulletins