Dark Reading is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them.Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

Risk

New IE Vulnerability Found In The Wild; Sophisticated Web Exploit Follows

New advanced persistent threat leverages IE browser flaw, FireEye researchers say

A new security vulnerability in Microsoft's Internet Explorer has been discovered, and attackers have already used it to create a sophisticated exploit, according to researchers at FireEye.

In a blog posted Monday, FireEye researchers disclosed a memory access vulnerability that works on Windows XP with IE 7 and 8, as well as Windows 7 with IE 9. The vulnerability enables attackers to compromise IE machines that access a malicious website.

"The exploit leverages a new information leakage vulnerability and an IE out-of-bounds memory access vulnerability to achieve code execution," the blog states. The attack infects cracks in a Windows machine at the DLL level, enabling it to infect the machine with a large, multistage shellcode payload, the researchers say.

In a separate blog, the researchers describe a sophisticated exploit found in the wild that uses the newly discovered vulnerability.

"Specifically, the attackers inserted this zero-day exploit into a strategically important website known to draw visitors that are likely interested in national and international security policy. We have identified relationships between the infrastructure used in this attack and that used in Operation DeputyDog," an attack that infected a number of organizations in Japan in September, the researchers say.

"Furthermore, the attackers loaded the payload used in this attack directly into memory without first writing to disk -- a technique not typically used by advanced persistent threat [APT] actors," the blog says. In-memory attacks generally cannot be detected by traditional anti-malware tools, FireEye notes.

"This technique will further complicate network defenders' ability to triage compromised systems using traditional forensics methods," the blog states.

John Prisco, CEO of security vendor Triumfant, agreed. "In-memory attacks steal your intellectual property faster than the response time of a manual technique relying on signatures and prior knowledge," he said.

Have a comment on this story? Please click "Add a Comment" below. If you'd like to contact Dark Reading's editors directly, send us a message. Tim Wilson is Editor in Chief and co-founder of Dark Reading.com, UBM Tech's online community for information security professionals. He is responsible for managing the site, assigning and editing content, and writing breaking news stories. Wilson has been recognized as one ... View Full Bio

Comment  | 
Print  | 
More Insights
Comments
Newest First  |  Oldest First  |  Threaded View
Commentary
Cyberattacks Are Tailored to Employees ... Why Isn't Security Training?
Tim Sadler, CEO and co-founder of Tessian,  6/17/2021
Edge-DRsplash-10-edge-articles
7 Powerful Cybersecurity Skills the Energy Sector Needs Most
Pam Baker, Contributing Writer,  6/22/2021
News
Microsoft Disrupts Large-Scale BEC Campaign Across Web Services
Kelly Sheridan, Staff Editor, Dark Reading,  6/15/2021
Register for Dark Reading Newsletters
White Papers
Video
Cartoon
Current Issue
The State of Cybersecurity Incident Response
In this report learn how enterprises are building their incident response teams and processes, how they research potential compromises, how they respond to new breaches, and what tools and processes they use to remediate problems and improve their cyber defenses for the future.
Flash Poll
How Enterprises are Developing Secure Applications
How Enterprises are Developing Secure Applications
Recent breaches of third-party apps are driving many organizations to think harder about the security of their off-the-shelf software as they continue to move left in secure software development practices.
Twitter Feed
Dark Reading - Bug Report
Bug Report
Enterprise Vulnerabilities
From DHS/US-CERT's National Vulnerability Database
CVE-2021-2322
PUBLISHED: 2021-06-23
Vulnerability in OpenGrok (component: Web App). Versions that are affected are 1.6.7 and prior. Easily exploitable vulnerability allows low privileged attacker with network access via HTTPS to compromise OpenGrok. Successful attacks of this vulnerability can result in takeover of OpenGrok. CVSS 3.1 ...
CVE-2021-20019
PUBLISHED: 2021-06-23
A vulnerability in SonicOS where the HTTP server response leaks partial memory by sending a crafted HTTP request, this can potentially lead to an internal sensitive data disclosure vulnerability.
CVE-2021-21809
PUBLISHED: 2021-06-23
A command execution vulnerability exists in the default legacy spellchecker plugin in Moodle 3.10. A specially crafted series of HTTP requests can lead to command execution. An attacker must have administrator privileges to exploit this vulnerabilities.
CVE-2021-34067
PUBLISHED: 2021-06-23
Heap based buffer overflow in tsMuxer 2.6.16 allows attackers to cause a Denial of Service (DoS) by running the application with a crafted file.
CVE-2021-34068
PUBLISHED: 2021-06-23
Heap based buffer overflow in tsMuxer 2.6.16 allows attackers to cause a Denial of Service (DoS) by running the application with a crafted file.