Out-of-bounds write in Firefox ESR and Mozilla Firefox - CVE-2017-5448
Published: April 19, 2017 / Updated: May 4, 2017
Vulnerability identifier: #VU6332
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-2017-5448
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error in ClearKeyDecryptor while decrypting some Clearkey-encrypted media content. The ClearKeyDecryptor code runs within the Gecko Media Plugin (GMP) sandbox. If a second mechanism is found to escape the sandbox, this vulnerability allows for the writing of arbitrary data within memory. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
Affected software
Firefox ESR
Mozilla Firefox
Arch Linux
Gentoo Linux
SUSE Linux
Ubuntu
Mozilla Firefox
Arch Linux
Gentoo Linux
SUSE Linux
Ubuntu
How to mitigate CVE-2017-5448
Update to Firefox 53, Firefox ESR 45.9 or Firefox ESR 52.1.