Zero-day vulnerability in Microsoft Internet Explorer

Use-after-free error

The vulnerability used ROP-chain technique and was exploited in Campaign Operation DeputyDog.

The vulnerability was initially found in the wild in Japan, but other regions such as English, Chinese, Korean, etc, were targeted as well.

Vulnerability details

Advisory: SB2013091701 - Remote code execution in Microsoft Internet Explorer

Vulnerable component: Microsoft Internet Explorer

CVE-ID: CVE-2013-3893

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-416 - Use After Free


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

The weakness exists due to use-after-free error in SetMouseCapture implementation. A remote attacker can create specially crafted JavaScript, place it on a Web page, trick the victim into visiting it using Internet Explorer, 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.

Known APT campaigns:

Operation DeputyDog

The campaign began on August 19, 2013 and targeted Japanese organizations. According to FireEye researchers, who detected the campaign, the attack payload was connected to the host in Hong Kong and the malware тАУ to the host in South Korea.

Public Exploits:

External links: