Arbitrary code execution in Mozilla Firefox and Oracle Linux - CVE-2016-5276

Vulnerability identifier: #VU613

CSH Severity: High

CVSS v4: 9.3 [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]

CVE-ID: CVE-2016-5276

CWE-ID: CWE-284

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability may lead to arbitrary code execution on the target system.
The weakness exists during setting of aria-owns attribute. A use-after-free memory error in mozilla::a11y::DocAccessible::ProcessInvalidationList() allows attackers to execute arbitrary code.
Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Mozilla Firefox
Oracle Linux

Update to 49.0.

• https://www.mozilla.org/en-US/security/advisories/mfsa2016-85/
• http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
• http://www.oracle.com/technetwork/topics/security/bulletinoct2016-3090566.html

• Arbitrary code execution in Mozilla Firefox