Latest Internet Explorer Zero Day (CVE-2014-0322) Exploited In The Wild (Feb 14, 2014)

Dell Sonicwall Threats Research Team has spotted latest Zero Day that exploits Vulnerability CVE-2014-0322.
This exploit targets Internet Explorer 10 which contains a specially crafted JavaScript that causes Use-After-Free condition.
The exploit was getting served from an infected website which since has taken down the malicious HTML.

Following shows the structure of the exploit.

Here an ActiveXObject is getting instantiated.

We can see the code for Memory Corruption.

Here function puIHa3 has a check for presence of a DLL followed by reference to swf file.
Also, we can see the exploit specifically checks for the presence of IE 10.

The swf file has function ExternalInterface which is invoking puIHa3 in the JavaScript above.

Swf is also responsible for further allocating bytes to carry out successful exploitation.

We have implemented following signatures to detect the attack.

• IPS: 6315 HTTP Client Shellcode Exploit 11a
• IPS: 7454 HTTP Client Shellcode Exploit 35a
• GAV: CVE-2014-0322#swf (Exploit)
• GAV: CVE-2014-0322#html (Exploit)

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The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.