Microsoft Internet Explorer CustomEvent Use-After-Free Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Internet Explorer. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the implementation of the CustomEvent object. By performing actions in script, an attacker can cause a pointer to be reused after it has been freed. An attacker can leverage this vulnerability to execute code in the context of the current process.
Additional Details
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0665
Disclosure Timeline
- 2018-12-19 - Vulnerability reported to vendor
- 2019-03-12 - Coordinated public release of advisory
Credit
Simon Zuckerbraun - Trend Micro Zero Day Initiative
