Remote code execution in Microsoft Internet Explorer

Published: 2019-09-23 | Updated: 2019-09-24
Severity Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-1367
CWE ID CWE-416
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Microsoft Internet Explorer Subscribe
Vendor Microsoft

Security Advisory

This security advisory describes one critical risk vulnerability.

Updated: 24.09.2019
Changed vulnerability type from CWE-119 (buffer overflow) to CWE-416 (use-after-free).

1) Use-after-free

Severity: Critical

CVSSv3: 9.2 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-1367

CWE-ID: CWE-416 - Use After Free

Description

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

The vulnerability exists due to a use-after-free error within the scripting engine in JScript.dll. A remote attacker can create a specially crafted webpage, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note: this vulnerability is being actively exploited in the wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Internet Explorer: 9, 10, 11

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1367

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.