Use-after-free in Tor Project products - CVE-2016-9079
Published: December 1, 2016 / Updated: February 27, 2017
Vulnerability identifier: #VU1191
CSH Severity: Critical
CVSS v4.0: 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:A/U:Red
CVE-ID: CVE-2016-9079
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Mozilla
Tor Project
Tor Project
Affected software:
Mozilla Firefox
Tor Browser
Mozilla Thunderbird
Mozilla Firefox
Tor Browser
Mozilla Thunderbird
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to use-after-free error when processing SVG animation in nsSMILTimeContainer::NotifyTimeChange() function. A remote attacker can create a specially crafted web page, host malicious SVG file on it and execute arbitrary code on vulnerable system.
Successful exploitation may allow an attacker to gain complete control over vulnerable system.
Note: this vulnerability is being publicly exploited against Tor Browser users.
How to mitigate CVE-2016-9079
Update Firefox to version 50.0.2, Thunderbird to version 45.5.1, Tor Browser to version 6.0.7.