Use-after-free error in Firefox ESR - CVE-2017-7750

Vulnerability identifier: #VU7065

CSH Severity: High

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2017-7750

CWE-ID: CWE-416

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Mozilla

Affected software:
Firefox ESR

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to use-after-free error during video control operations when a <track> element holds a reference to an older window if that window has been replaced in the DOM. A remote attacker can trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability may result in system compromise.

Update to version 52.2.

• https://www.mozilla.org/en-US/security/advisories/mfsa2017-16/