“Use-after-free” error in Microsoft Internet Explorer - CVE-2014-0307

Vulnerability identifier: #VU4997

CSH Severity: Critical

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-2014-0307

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: Public exploit is available

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

The weakness exists due to use-after-free when accessing an object in memory. A remote attacker can create a specially crafted Web site, trick the victim into visiting it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Microsoft Internet Explorer

Install update from vendor's website.

• Exploit #820 - Microsoft Internet Explorer - TextRange Use-After-Free (MS14-012) (Metasploit) (March 18, 2020)
• Exploit #1661 - MS14-012 Microsoft Internet Explorer TextRange Use-After-Free (March 18, 2020)

• https://technet.microsoft.com/en-us/library/security/ms14-012

• Remote code execution in Microsoft Internet Explorer